157766013 has 6 divisors (see below), whose sum is σ = 227884254. Its totient is φ = 105177336.

The previous prime is 157766009. The next prime is 157766017. The reversal of 157766013 is 310667751.

It is an interprime number because it is at equal distance from previous prime (157766009) and next prime (157766017).

It can be written as a sum of positive squares in only one way, i.e., 156425049 + 1340964 = 12507^2 + 1158^2 .

It is not a de Polignac number, because 157766013 - 2² = 157766009 is a prime.

It is a super-2 number, since 2×157766013² = 49780229715832338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157766017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8764770 + ... + 8764787.

It is an arithmetic number, because the mean of its divisors is an integer number (37980709).

Almost surely, 2^157766013 is an apocalyptic number.

It is an amenable number.

157766013 is a deficient number, since it is larger than the sum of its proper divisors (70118241).

157766013 is a wasteful number, since it uses less digits than its factorization.

157766013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17529563 (or 17529560 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 157766013 is about 12560.4941383689. The cubic root of 157766013 is about 540.3450161413.

The spelling of 157766013 in words is "one hundred fifty-seven million, seven hundred sixty-six thousand, thirteen".