665895492 has 30 divisors (see below), whose sum is σ = 1740783198. Its totient is φ = 221965056.

The previous prime is 665895479. The next prime is 665895493. The reversal of 665895492 is 294598566.

It is a happy number.

665895492 is a `hidden beast` number, since 6 + 6 + 589 + 54 + 9 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 484616196 + 181279296 = 22014^2 + 13464^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (665895493) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1027293 + ... + 1027940.

Almost surely, 2^665895492 is an apocalyptic number.

It is an amenable number.

665895492 is an abundant number, since it is smaller than the sum of its proper divisors (1074887706).

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

665895492 is a wasteful number, since it uses less digits than its factorization.

665895492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055249 (or 2055238 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 665895492 is about 25804.9509203176. The cubic root of 665895492 is about 873.2434932091.

The spelling of 665895492 in words is "six hundred sixty-five million, eight hundred ninety-five thousand, four hundred ninety-two".