166770978 has 32 divisors (see below), whose sum is σ = 364322880. Its totient is φ = 50472960.

The previous prime is 166770943. The next prime is 166770983. The reversal of 166770978 is 879077661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 166770978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97426 + ... + 99122.

It is an arithmetic number, because the mean of its divisors is an integer number (11385090).

Almost surely, 2^166770978 is an apocalyptic number.

166770978 is an abundant number, since it is smaller than the sum of its proper divisors (197551902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166770978 is a wasteful number, since it uses less digits than its factorization.

166770978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3202.

The product of its (nonzero) digits is 889056, while the sum is 51.

The square root of 166770978 is about 12913.9838160035. The cubic root of 166770978 is about 550.4359936835.

The spelling of 166770978 in words is "one hundred sixty-six million, seven hundred seventy thousand, nine hundred seventy-eight".