866446671000042 has 48 divisors (see below), whose sum is σ = 2123815409063712. Its totient is φ = 262559597271120.

The previous prime is 866446670999989. The next prime is 866446671000047. The reversal of 866446671000042 is 240000176644668.

It is a happy number.

866446671000042 is a `hidden beast` number, since 86 + 64 + 466 + 7 + 1 + 0 + 0 + 0 + 0 + 42 = 666.

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 (866446671000047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81036907393 + ... + 81036918084.

It is an arithmetic number, because the mean of its divisors is an integer number (44246154355494).

Almost surely, 2^{866446671000042} is an apocalyptic number.

866446671000042 is an abundant number, since it is smaller than the sum of its proper divisors (1257368738063670).

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

866446671000042 is a wasteful number, since it uses less digits than its factorization.

866446671000042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162073825505 (or 162073825493 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 866446671000042 in words is "eight hundred sixty-six trillion, four hundred forty-six billion, six hundred seventy-one million, forty-two", and thus it is an aban number.