166325978 has 64 divisors (see below), whose sum is σ = 320931072. Its totient is φ = 62899200.

The previous prime is 166325963. The next prime is 166325993. The reversal of 166325978 is 879523661.

It is an interprime number because it is at equal distance from previous prime (166325963) and next prime (166325993).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 414578 + ... + 414978.

It is an arithmetic number, because the mean of its divisors is an integer number (5014548).

Almost surely, 2^166325978 is an apocalyptic number.

166325978 is a deficient number, since it is larger than the sum of its proper divisors (154605094).

166325978 is a wasteful number, since it uses less digits than its factorization.

166325978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519.

The product of its digits is 544320, while the sum is 47.

The square root of 166325978 is about 12896.7429221490. The cubic root of 166325978 is about 549.9459759609.

The spelling of 166325978 in words is "one hundred sixty-six million, three hundred twenty-five thousand, nine hundred seventy-eight".