766557704023 has 8 divisors (see below), whose sum is σ = 809138041520. Its totient is φ = 726212555208.

The previous prime is 766557703997. The next prime is 766557704041. The reversal of 766557704023 is 320407755667.

It is not a de Polignac number, because 766557704023 - 2²¹ = 766555606871 is a prime.

It is a super-2 number, since 2×766557704023² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766557704053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55872840 + ... + 55886557.

It is an arithmetic number, because the mean of its divisors is an integer number (101142255190).

Almost surely, 2^766557704023 is an apocalyptic number.

766557704023 is a deficient number, since it is larger than the sum of its proper divisors (42580337497).

766557704023 is an equidigital number, since it uses as much as digits as its factorization.

766557704023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111759454 (or 111759416 counting only the distinct ones).

The product of its (nonzero) digits is 7408800, while the sum is 52.

The spelling of 766557704023 in words is "seven hundred sixty-six billion, five hundred fifty-seven million, seven hundred four thousand, twenty-three".