264668062681 has 9 divisors (see below), whose sum is σ = 290922355423. Its totient is φ = 240602185120.

The previous prime is 264668062661. The next prime is 264668062693. The reversal of 264668062681 is 186260866462.

The square root of 264668062681 is 514459.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 56877957081 + 207790105600 = 238491^2 + 455840^2 .

It is not a de Polignac number, because 264668062681 - 2³⁷ = 127229109209 is a prime.

It is a super-2 number, since 2×264668062681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264668062621) 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 8 ways as a sum of consecutive naturals, for example, 5635665 + ... + 5682433.

Almost surely, 2^264668062681 is an apocalyptic number.

264668062681 is the 514459-th square number.

264668062681 is the 257230-th centered octagonal number.

It is an amenable number.

264668062681 is a deficient number, since it is larger than the sum of its proper divisors (26254292742).

264668062681 is an frugal number, since it uses more digits than its factorization.

264668062681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93560 (or 46780 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 55.

The spelling of 264668062681 in words is "two hundred sixty-four billion, six hundred sixty-eight million, sixty-two thousand, six hundred eighty-one".