666564140443102 has 16 divisors (see below), whose sum is σ = 1093977941866992. Its totient is φ = 302084638773120.

The previous prime is 666564140443079. The next prime is 666564140443127. The reversal of 666564140443102 is 201344041465666.

It is a self number, because there is not a number n which added to its sum of digits gives 666564140443102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44953063833 + ... + 44953078660.

It is an arithmetic number, because the mean of its divisors is an integer number (68373621366687).

Almost surely, 2^{666564140443102} is an apocalyptic number.

666564140443102 is a deficient number, since it is larger than the sum of its proper divisors (427413801423890).

666564140443102 is a wasteful number, since it uses less digits than its factorization.

666564140443102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89906142843.

The product of its (nonzero) digits is 9953280, while the sum is 52.

The spelling of 666564140443102 in words is "six hundred sixty-six trillion, five hundred sixty-four billion, one hundred forty million, four hundred forty-three thousand, one hundred two".