166251380908 has 12 divisors (see below), whose sum is σ = 291034429840. Its totient is φ = 83098686672.

The previous prime is 166251380899. The next prime is 166251380909. The reversal of 166251380908 is 809083152661.

It is not an unprimeable number, because it can be changed into a prime (166251380909) 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, 6737091 + ... + 6761722.

Almost surely, 2^166251380908 is an apocalyptic number.

It is an amenable number.

166251380908 is a deficient number, since it is larger than the sum of its proper divisors (124783048932).

166251380908 is a wasteful number, since it uses less digits than its factorization.

166251380908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13501896 (or 13501894 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 166251380908 in words is "one hundred sixty-six billion, two hundred fifty-one million, three hundred eighty thousand, nine hundred eight".