166878670 has 32 divisors (see below), whose sum is σ = 350604288. Its totient is φ = 55997088.

The previous prime is 166878661. The next prime is 166878671. The reversal of 166878670 is 76878661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166878671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22072 + ... + 28651.

It is an arithmetic number, because the mean of its divisors is an integer number (10956384).

Almost surely, 2^166878670 is an apocalyptic number.

166878670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166878670 is an abundant number, since it is smaller than the sum of its proper divisors (183725618).

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

166878670 is a wasteful number, since it uses less digits than its factorization.

166878670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50784.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 166878670 is about 12918.1527317183. The cubic root of 166878670 is about 550.5544491424.

Subtracting from 166878670 its reverse (76878661), we obtain a palindrome (90000009).

The spelling of 166878670 in words is "one hundred sixty-six million, eight hundred seventy-eight thousand, six hundred seventy".