666051156 has 36 divisors (see below), whose sum is σ = 1772243200. Its totient is φ = 210331728.

The previous prime is 666051107. The next prime is 666051157. The reversal of 666051156 is 651150666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 666051156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666051157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 486196 + ... + 487563.

Almost surely, 2^666051156 is an apocalyptic number.

It is an amenable number.

666051156 is an abundant number, since it is smaller than the sum of its proper divisors (1106192044).

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

666051156 is a wasteful number, since it uses less digits than its factorization.

666051156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973788 (or 973783 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 666051156 is about 25807.9669094642. The cubic root of 666051156 is about 873.3115329070.

The spelling of 666051156 in words is "six hundred sixty-six million, fifty-one thousand, one hundred fifty-six".