766662371024357 has 4 divisors (see below), whose sum is σ = 766664884836396. Its totient is φ = 766659857212320.

The previous prime is 766662371024327. The next prime is 766662371024413. The reversal of 766662371024357 is 753420173266667.

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

It can be written as a sum of positive squares in 2 ways, for example, as 331777809723361 + 434884561300996 = 18214769^2 + 20853886^2 .

It is a cyclic number.

It is not a de Polignac number, because 766662371024357 - 2⁶ = 766662371024293 is a prime.

It is a super-2 number, since 2×766662371024357² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 766662371024293 and 766662371024302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766662371024327) 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, 1256448494 + ... + 1257058527.

It is an arithmetic number, because the mean of its divisors is an integer number (191666221209099).

Almost surely, 2^{766662371024357} is an apocalyptic number.

It is an amenable number.

766662371024357 is a deficient number, since it is larger than the sum of its proper divisors (2513812039).

766662371024357 is a wasteful number, since it uses less digits than its factorization.

766662371024357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513812038.

The product of its (nonzero) digits is 320060160, while the sum is 65.

The spelling of 766662371024357 in words is "seven hundred sixty-six trillion, six hundred sixty-two billion, three hundred seventy-one million, twenty-four thousand, three hundred fifty-seven".