166357702387 has 4 divisors (see below), whose sum is σ = 166364350816. Its totient is φ = 166351053960.

The previous prime is 166357702373. The next prime is 166357702397. The reversal of 166357702387 is 783207753661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166357702387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166357702397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3286539 + ... + 3336772.

It is an arithmetic number, because the mean of its divisors is an integer number (41591087704).

Almost surely, 2^166357702387 is an apocalyptic number.

166357702387 is a deficient number, since it is larger than the sum of its proper divisors (6648429).

166357702387 is an equidigital number, since it uses as much as digits as its factorization.

166357702387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6648428.

The product of its (nonzero) digits is 8890560, while the sum is 55.

The spelling of 166357702387 in words is "one hundred sixty-six billion, three hundred fifty-seven million, seven hundred two thousand, three hundred eighty-seven".