664268879476 has 6 divisors (see below), whose sum is σ = 1162470539090. Its totient is φ = 332134439736.

The previous prime is 664268879471. The next prime is 664268879479. The reversal of 664268879476 is 674978862466.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 520230412900 + 144038466576 = 721270^2 + 379524^2 .

It is a super-2 number, since 2×664268879476² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664268879399 and 664268879408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664268879471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83033609931 + ... + 83033609938.

Almost surely, 2^664268879476 is an apocalyptic number.

It is an amenable number.

664268879476 is a deficient number, since it is larger than the sum of its proper divisors (498201659614).

664268879476 is a wasteful number, since it uses less digits than its factorization.

664268879476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166067219873 (or 166067219871 counting only the distinct ones).

The product of its digits is 1170505728, while the sum is 73.

The spelling of 664268879476 in words is "six hundred sixty-four billion, two hundred sixty-eight million, eight hundred seventy-nine thousand, four hundred seventy-six".