665126112 has 96 divisors (see below), whose sum is σ = 2000968704. Its totient is φ = 189504000.

The previous prime is 665126101. The next prime is 665126123. The reversal of 665126112 is 211621566.

It is an interprime number because it is at equal distance from previous prime (665126101) and next prime (665126123).

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 665126112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281737 + ... + 284087.

It is an arithmetic number, because the mean of its divisors is an integer number (20843424).

Almost surely, 2^665126112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665126112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1000484352).

665126112 is an abundant number, since it is smaller than the sum of its proper divisors (1335842592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665126112 is a wasteful number, since it uses less digits than its factorization.

665126112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792 (or 2784 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 665126112 is about 25790.0390073377. The cubic root of 665126112 is about 872.9070465200.

Adding to 665126112 its reverse (211621566), we get a palindrome (876747678).

The spelling of 665126112 in words is "six hundred sixty-five million, one hundred twenty-six thousand, one hundred twelve".