157665566751 has 64 divisors (see below), whose sum is σ = 277656615936. Its totient is φ = 77045760000.

The previous prime is 157665566731. The next prime is 157665566809.

157665566751 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 157665566751 - 2¹⁷ = 157665435679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157665566731) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8288251 + ... + 8307251.

It is an arithmetic number, because the mean of its divisors is an integer number (4338384624).

Almost surely, 2^157665566751 is an apocalyptic number.

157665566751 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

157665566751 is a deficient number, since it is larger than the sum of its proper divisors (119991049185).

157665566751 is a wasteful number, since it uses less digits than its factorization.

157665566751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21152.

The product of its digits is 39690000, while the sum is 60.

The spelling of 157665566751 in words is "one hundred fifty-seven billion, six hundred sixty-five million, five hundred sixty-six thousand, seven hundred fifty-one".