157066665 has 32 divisors (see below), whose sum is σ = 294977280. Its totient is φ = 69859584.

The previous prime is 157066661. The next prime is 157066667. The reversal of 157066665 is 566660751.

157066665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157066665 - 2² = 157066661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157066661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16330 + ... + 24099.

It is an arithmetic number, because the mean of its divisors is an integer number (9218040).

Almost surely, 2^157066665 is an apocalyptic number.

157066665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157066665 is a deficient number, since it is larger than the sum of its proper divisors (137910615).

157066665 is a wasteful number, since it uses less digits than its factorization.

157066665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40481.

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 157066665 is about 12532.6240269147. The cubic root of 157066665 is about 539.5454164690.

The spelling of 157066665 in words is "one hundred fifty-seven million, sixty-six thousand, six hundred sixty-five".