80664751 has 2 divisors, whose sum is σ = 80664752. Its totient is φ = 80664750.

The previous prime is 80664721. The next prime is 80664757. The reversal of 80664751 is 15746608.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80664751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80664751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80664757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40332375 + 40332376.

It is an arithmetic number, because the mean of its divisors is an integer number (40332376).

Almost surely, 2^80664751 is an apocalyptic number.

80664751 is a deficient number, since it is larger than the sum of its proper divisors (1).

80664751 is an equidigital number, since it uses as much as digits as its factorization.

80664751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 80664751 is about 8981.3557439843. The cubic root of 80664751 is about 432.0771163629.

The spelling of 80664751 in words is "eighty million, six hundred sixty-four thousand, seven hundred fifty-one".