166397056700 has 54 divisors (see below), whose sum is σ = 420033725496. Its totient is φ = 57050417760.

The previous prime is 166397056691. The next prime is 166397056717. The reversal of 166397056700 is 7650793661.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16974392 + ... + 16984191.

It is an arithmetic number, because the mean of its divisors is an integer number (7778402324).

Almost surely, 2^166397056700 is an apocalyptic number.

166397056700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166397056700 is an abundant number, since it is smaller than the sum of its proper divisors (253636668796).

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

166397056700 is a wasteful number, since it uses less digits than its factorization.

166397056700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33958611 (or 33958597 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 50.

The spelling of 166397056700 in words is "one hundred sixty-six billion, three hundred ninety-seven million, fifty-six thousand, seven hundred".