166551912 has 48 divisors (see below), whose sum is σ = 451996740. Its totient is φ = 55404288.

The previous prime is 166551863. The next prime is 166551919. The reversal of 166551912 is 219155661.

166551912 is a `hidden beast` number, since 16 + 6 + 551 + 91 + 2 = 666.

166551912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 116510436 + 50041476 = 10794^2 + 7074^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (166551919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38028 + ... + 42180.

Almost surely, 2^166551912 is an apocalyptic number.

166551912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166551912 is an abundant number, since it is smaller than the sum of its proper divisors (285444828).

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

166551912 is a wasteful number, since it uses less digits than its factorization.

166551912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722 (or 4715 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 166551912 is about 12905.4992929371. The cubic root of 166551912 is about 550.1948752965.

The spelling of 166551912 in words is "one hundred sixty-six million, five hundred fifty-one thousand, nine hundred twelve".