166039343725 has 12 divisors (see below), whose sum is σ = 205896030516. Its totient is φ = 132826801280.

The previous prime is 166039343693. The next prime is 166039343737. The reversal of 166039343725 is 527343930661.

It can be written as a sum of positive squares in 6 ways, for example, as 1899303561 + 164140040164 = 43581^2 + 405142^2 .

It is not a de Polignac number, because 166039343725 - 2⁵ = 166039343693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 727539 + ... + 928111.

It is an arithmetic number, because the mean of its divisors is an integer number (17158002543).

Almost surely, 2^166039343725 is an apocalyptic number.

It is an amenable number.

166039343725 is a deficient number, since it is larger than the sum of its proper divisors (39856686791).

166039343725 is a wasteful number, since it uses less digits than its factorization.

166039343725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233696 (or 233691 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 49.

The spelling of 166039343725 in words is "one hundred sixty-six billion, thirty-nine million, three hundred forty-three thousand, seven hundred twenty-five".