166907991748 has 24 divisors (see below), whose sum is σ = 307299959064. Its totient is φ = 79218028800.

The previous prime is 166907991743. The next prime is 166907991763. The reversal of 166907991748 is 847199709661.

It can be written as a sum of positive squares in 4 ways, for example, as 143568324 + 166764423424 = 11982^2 + 408368^2 .

It is not an unprimeable number, because it can be changed into a prime (166907991743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13747063 + ... + 13759198.

It is an arithmetic number, because the mean of its divisors is an integer number (12804164961).

Almost surely, 2^166907991748 is an apocalyptic number.

It is an amenable number.

166907991748 is a deficient number, since it is larger than the sum of its proper divisors (140391967316).

166907991748 is a wasteful number, since it uses less digits than its factorization.

166907991748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27506343 (or 27506341 counting only the distinct ones).

The product of its (nonzero) digits is 41150592, while the sum is 67.

The spelling of 166907991748 in words is "one hundred sixty-six billion, nine hundred seven million, nine hundred ninety-one thousand, seven hundred forty-eight".