166877969 has 16 divisors (see below), whose sum is σ = 181030080. Its totient is φ = 153316800.

The previous prime is 166877947. The next prime is 166877981. The reversal of 166877969 is 969778661.

166877969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166877969 is a prime.

It is a super-2 number, since 2×166877969² = 55696513075129922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166877989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127619 + ... + 128919.

It is an arithmetic number, because the mean of its divisors is an integer number (11314380).

Almost surely, 2^166877969 is an apocalyptic number.

166877969 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

166877969 is a deficient number, since it is larger than the sum of its proper divisors (14152111).

166877969 is a wasteful number, since it uses less digits than its factorization.

166877969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520.

The product of its digits is 6858432, while the sum is 59.

The square root of 166877969 is about 12918.1255993275. The cubic root of 166877969 is about 550.5536782445.

The spelling of 166877969 in words is "one hundred sixty-six million, eight hundred seventy-seven thousand, nine hundred sixty-nine".