157996066 has 4 divisors (see below), whose sum is σ = 236994102. Its totient is φ = 78998032.

The previous prime is 157996051. The next prime is 157996081. The reversal of 157996066 is 660699751.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (157996051) and next prime (157996081).

It can be written as a sum of positive squares in only one way, i.e., 96452041 + 61544025 = 9821^2 + 7845^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39499015 + ... + 39499018.

Almost surely, 2^157996066 is an apocalyptic number.

157996066 is a deficient number, since it is larger than the sum of its proper divisors (78998036).

157996066 is an equidigital number, since it uses as much as digits as its factorization.

157996066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78998035.

The product of its (nonzero) digits is 612360, while the sum is 49.

The square root of 157996066 is about 12569.6486028846. The cubic root of 157996066 is about 540.6075306861.

The spelling of 157996066 in words is "one hundred fifty-seven million, nine hundred ninety-six thousand, sixty-six".