166703668670 has 48 divisors (see below), whose sum is σ = 376943190624. Its totient is φ = 51959582400.

The previous prime is 166703668661. The next prime is 166703668679. The reversal of 166703668670 is 76866307661.

It is an interprime number because it is at equal distance from previous prime (166703668661) and next prime (166703668679).

It is a super-2 number, since 2×166703668670² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166703668679) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9832361 + ... + 9849300.

It is an arithmetic number, because the mean of its divisors is an integer number (7852983138).

Almost surely, 2^166703668670 is an apocalyptic number.

166703668670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166703668670 is an abundant number, since it is smaller than the sum of its proper divisors (210239521954).

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

166703668670 is a wasteful number, since it uses less digits than its factorization.

166703668670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19681697 (or 19681686 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 56.

The spelling of 166703668670 in words is "one hundred sixty-six billion, seven hundred three million, six hundred sixty-eight thousand, six hundred seventy".