157666312 has 8 divisors (see below), whose sum is σ = 295624350. Its totient is φ = 78833152.

The previous prime is 157666291. The next prime is 157666321. The reversal of 157666312 is 213666751.

157666312 is digitally balanced in base 3, 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 only one way, i.e., 157402116 + 264196 = 12546^2 + 514^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9854137 + ... + 9854152.

Almost surely, 2^157666312 is an apocalyptic number.

It is an amenable number.

157666312 is a deficient number, since it is larger than the sum of its proper divisors (137958038).

157666312 is a wasteful number, since it uses less digits than its factorization.

157666312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19708295 (or 19708291 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 157666312 is about 12556.5246784291. The cubic root of 157666312 is about 540.2311676010.

The spelling of 157666312 in words is "one hundred fifty-seven million, six hundred sixty-six thousand, three hundred twelve".