6602664997 has 2 divisors, whose sum is σ = 6602664998. Its totient is φ = 6602664996.

The previous prime is 6602664989. The next prime is 6602665067. The reversal of 6602664997 is 7994662066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5824589761 + 778075236 = 76319^2 + 27894^2 .

It is a cyclic number.

It is not a de Polignac number, because 6602664997 - 2³ = 6602664989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6602674997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3301332498 + 3301332499.

It is an arithmetic number, because the mean of its divisors is an integer number (3301332499).

Almost surely, 2^6602664997 is an apocalyptic number.

It is an amenable number.

6602664997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6602664997 is an equidigital number, since it uses as much as digits as its factorization.

6602664997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 55.

The square root of 6602664997 is about 81256.7843136805. The cubic root of 6602664997 is about 1876.0298931753.

The spelling of 6602664997 in words is "six billion, six hundred two million, six hundred sixty-four thousand, nine hundred ninety-seven".