157666865713 has 24 divisors (see below), whose sum is σ = 186280252200. Its totient is φ = 133040210688.

The previous prime is 157666865711. The next prime is 157666865723. The reversal of 157666865713 is 317568666751.

It is a happy number.

157666865713 is digitally balanced in base 2, 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 4 ways, for example, as 29662483984 + 128004381729 = 172228^2 + 357777^2 .

It is not a de Polignac number, because 157666865713 - 2¹ = 157666865711 is a prime.

It is a super-2 number, since 2×157666865713² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157666865711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 919731 + ... + 1077607.

It is an arithmetic number, because the mean of its divisors is an integer number (7761677175).

Almost surely, 2^157666865713 is an apocalyptic number.

It is an amenable number.

157666865713 is a deficient number, since it is larger than the sum of its proper divisors (28613386487).

157666865713 is a wasteful number, since it uses less digits than its factorization.

157666865713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158209 (or 158202 counting only the distinct ones).

The product of its digits is 38102400, while the sum is 61.

The spelling of 157666865713 in words is "one hundred fifty-seven billion, six hundred sixty-six million, eight hundred sixty-five thousand, seven hundred thirteen".