166115600639 has 2 divisors, whose sum is σ = 166115600640. Its totient is φ = 166115600638.

The previous prime is 166115600633. The next prime is 166115600719. The reversal of 166115600639 is 936006511661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166115600639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166115600639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166115600633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83057800319 + 83057800320.

It is an arithmetic number, because the mean of its divisors is an integer number (83057800320).

Almost surely, 2^166115600639 is an apocalyptic number.

166115600639 is a deficient number, since it is larger than the sum of its proper divisors (1).

166115600639 is an equidigital number, since it uses as much as digits as its factorization.

166115600639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 166115600639 in words is "one hundred sixty-six billion, one hundred fifteen million, six hundred thousand, six hundred thirty-nine".