666232416 has 144 divisors (see below), whose sum is σ = 2014412400. Its totient is φ = 208272384.

The previous prime is 666232393. The next prime is 666232429. The reversal of 666232416 is 614232666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 595890 + ... + 597006.

It is an arithmetic number, because the mean of its divisors is an integer number (13988975).

Almost surely, 2^666232416 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 666232416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1007206200).

666232416 is an abundant number, since it is smaller than the sum of its proper divisors (1348179984).

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

666232416 is a wasteful number, since it uses less digits than its factorization.

666232416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261 (or 1250 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 666232416 is about 25811.4783768772. The cubic root of 666232416 is about 873.3907470882.

The spelling of 666232416 in words is "six hundred sixty-six million, two hundred thirty-two thousand, four hundred sixteen".