76664433556 has 6 divisors (see below), whose sum is σ = 134162758730. Its totient is φ = 38332216776.

The previous prime is 76664433551. The next prime is 76664433569. The reversal of 76664433556 is 65533446667.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 73712250000 + 2952183556 = 271500^2 + 54334^2 .

It is a junction number, because it is equal to n+sod(n) for n = 76664433497 and 76664433506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76664433551) 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, 9583054191 + ... + 9583054198.

Almost surely, 2^76664433556 is an apocalyptic number.

It is an amenable number.

76664433556 is a deficient number, since it is larger than the sum of its proper divisors (57498325174).

76664433556 is a wasteful number, since it uses less digits than its factorization.

76664433556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19166108393 (or 19166108391 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 55.

The spelling of 76664433556 in words is "seventy-six billion, six hundred sixty-four million, four hundred thirty-three thousand, five hundred fifty-six".