7990929664 has 81 divisors (see below), whose sum is σ = 16502679081. Its totient is φ = 3861734400.

The previous prime is 7990929659. The next prime is 7990929673. The reversal of 7990929664 is 4669290997.

The square root of 7990929664 is 89392.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7150393600 + 840536064 = 84560^2 + 28992^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 52919989 + ... + 52920139.

Almost surely, 2^7990929664 is an apocalyptic number.

7990929664 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

7990929664 is the 89392-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7990929664

7990929664 is an abundant number, since it is smaller than the sum of its proper divisors (8511749417).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7990929664 is an frugal number, since it uses more digits than its factorization.

7990929664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 61.

The cubic root of 7990929664 is about 1999.2438528234.

The spelling of 7990929664 in words is "seven billion, nine hundred ninety million, nine hundred twenty-nine thousand, six hundred sixty-four".