157651668 has 36 divisors (see below), whose sum is σ = 400047648. Its totient is φ = 52347600.

The previous prime is 157651661. The next prime is 157651673. The reversal of 157651668 is 866156751.

157651668 is a `hidden beast` number, since 1 + 5 + 76 + 516 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157651661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1143 + ... + 17793.

Almost surely, 2^157651668 is an apocalyptic number.

157651668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

157651668 is an abundant number, since it is smaller than the sum of its proper divisors (242395980).

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

157651668 is a wasteful number, since it uses less digits than its factorization.

157651668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16924 (or 16919 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 157651668 is about 12555.9415417562. The cubic root of 157651668 is about 540.2144415799.

The spelling of 157651668 in words is "one hundred fifty-seven million, six hundred fifty-one thousand, six hundred sixty-eight".