166107751937 has 4 divisors (see below), whose sum is σ = 170597150676. Its totient is φ = 161618353200.

The previous prime is 166107751919. The next prime is 166107751981. The reversal of 166107751937 is 739157701661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 147142055281 + 18965696656 = 383591^2 + 137716^2 .

It is not a de Polignac number, because 166107751937 - 2²⁸ = 165839316481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166107711937) 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, 2244699314 + ... + 2244699387.

It is an arithmetic number, because the mean of its divisors is an integer number (42649287669).

Almost surely, 2^166107751937 is an apocalyptic number.

It is an amenable number.

166107751937 is a deficient number, since it is larger than the sum of its proper divisors (4489398739).

166107751937 is an equidigital number, since it uses as much as digits as its factorization.

166107751937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489398738.

The product of its (nonzero) digits is 1666980, while the sum is 53.

The spelling of 166107751937 in words is "one hundred sixty-six billion, one hundred seven million, seven hundred fifty-one thousand, nine hundred thirty-seven".