157666666751 has 4 divisors (see below), whose sum is σ = 172000000104. Its totient is φ = 143333333400.

The previous prime is 157666666747. The next prime is 157666666823.

157666666751 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 157666666751 - 2² = 157666666747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157666666721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7166666660 + ... + 7166666681.

It is an arithmetic number, because the mean of its divisors is an integer number (43000000026).

Almost surely, 2^157666666751 is an apocalyptic number.

157666666751 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

157666666751 is a deficient number, since it is larger than the sum of its proper divisors (14333333353).

157666666751 is a wasteful number, since it uses less digits than its factorization.

157666666751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14333333352.

The product of its digits is 57153600, while the sum is 62.

The spelling of 157666666751 in words is "one hundred fifty-seven billion, six hundred sixty-six million, six hundred sixty-six thousand, seven hundred fifty-one".