76664437 has 2 divisors, whose sum is σ = 76664438. Its totient is φ = 76664436.

The previous prime is 76664389. The next prime is 76664453. The reversal of 76664437 is 73446667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45684081 + 30980356 = 6759^2 + 5566^2 .

It is a cyclic number.

It is not a de Polignac number, because 76664437 - 2¹¹ = 76662389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 76664393 and 76664402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76664837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38332218 + 38332219.

It is an arithmetic number, because the mean of its divisors is an integer number (38332219).

Almost surely, 2^76664437 is an apocalyptic number.

It is an amenable number.

76664437 is a deficient number, since it is larger than the sum of its proper divisors (1).

76664437 is an equidigital number, since it uses as much as digits as its factorization.

76664437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 43.

The square root of 76664437 is about 8755.8230338444. The cubic root of 76664437 is about 424.8131810978.

The spelling of 76664437 in words is "seventy-six million, six hundred sixty-four thousand, four hundred thirty-seven".