6650064997 has 2 divisors, whose sum is σ = 6650064998. Its totient is φ = 6650064996.

The previous prime is 6650064989. The next prime is 6650065007. The reversal of 6650064997 is 7994600566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5103530721 + 1546534276 = 71439^2 + 39326^2 .

It is a cyclic number.

It is not a de Polignac number, because 6650064997 - 2³ = 6650064989 is a prime.

It is a super-2 number, since 2×6650064997² = 88446728928649220018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6650064917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325032498 + 3325032499.

It is an arithmetic number, because the mean of its divisors is an integer number (3325032499).

Almost surely, 2^6650064997 is an apocalyptic number.

It is an amenable number.

6650064997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6650064997 is an equidigital number, since it uses as much as digits as its factorization.

6650064997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The square root of 6650064997 is about 81547.9306727032. The cubic root of 6650064997 is about 1880.5084822151.

The spelling of 6650064997 in words is "six billion, six hundred fifty million, sixty-four thousand, nine hundred ninety-seven".