6457668724 has 24 divisors (see below), whose sum is σ = 12172512968. Its totient is φ = 2979901440.

The previous prime is 6457668713. The next prime is 6457668733. The reversal of 6457668724 is 4278667546.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 671328100 + 5786340624 = 25910^2 + 76068^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416764 + ... + 431980.

Almost surely, 2^6457668724 is an apocalyptic number.

It is an amenable number.

6457668724 is a deficient number, since it is larger than the sum of its proper divisors (5714844244).

6457668724 is a wasteful number, since it uses less digits than its factorization.

6457668724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23395 (or 23393 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 55.

The square root of 6457668724 is about 80359.6212285747. The cubic root of 6457668724 is about 1862.1954193707.

The spelling of 6457668724 in words is "six billion, four hundred fifty-seven million, six hundred sixty-eight thousand, seven hundred twenty-four".