866610372 has 12 divisors (see below), whose sum is σ = 2022090896. Its totient is φ = 288870120.

The previous prime is 866610359. The next prime is 866610391. The reversal of 866610372 is 273016668.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 866610372.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36108754 + ... + 36108777.

Almost surely, 2^866610372 is an apocalyptic number.

It is an amenable number.

866610372 is an abundant number, since it is smaller than the sum of its proper divisors (1155480524).

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

866610372 is a wasteful number, since it uses less digits than its factorization.

866610372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72217538 (or 72217536 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 866610372 is about 29438.2467548596. The cubic root of 866610372 is about 953.3988583039.

The spelling of 866610372 in words is "eight hundred sixty-six million, six hundred ten thousand, three hundred seventy-two".