166607557534757 has 4 divisors (see below), whose sum is σ = 166788849763680. Its totient is φ = 166426265305836.

The previous prime is 166607557534753. The next prime is 166607557534793. The reversal of 166607557534757 is 757435755706661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166607557534757 - 2² = 166607557534753 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166607557534753) 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, 90646113083 + ... + 90646114920.

It is an arithmetic number, because the mean of its divisors is an integer number (41697212440920).

Almost surely, 2^{166607557534757} is an apocalyptic number.

It is an amenable number.

166607557534757 is a deficient number, since it is larger than the sum of its proper divisors (181292228923).

166607557534757 is an equidigital number, since it uses as much as digits as its factorization.

166607557534757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181292228922.

The product of its (nonzero) digits is 3889620000, while the sum is 74.

The spelling of 166607557534757 in words is "one hundred sixty-six trillion, six hundred seven billion, five hundred fifty-seven million, five hundred thirty-four thousand, seven hundred fifty-seven".