7990566641 has 8 divisors (see below), whose sum is σ = 8526345120. Its totient is φ = 7466310432.

The previous prime is 7990566611. The next prime is 7990566667. The reversal of 7990566641 is 1466650997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7990566641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7990566601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2879135 + ... + 2881908.

It is an arithmetic number, because the mean of its divisors is an integer number (1065793140).

Almost surely, 2^7990566641 is an apocalyptic number.

It is an amenable number.

7990566641 is a deficient number, since it is larger than the sum of its proper divisors (535778479).

7990566641 is a wasteful number, since it uses less digits than its factorization.

7990566641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5761135.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 7990566641 is about 89389.9694652594. The cubic root of 7990566641 is about 1999.2135775604.

The spelling of 7990566641 in words is "seven billion, nine hundred ninety million, five hundred sixty-six thousand, six hundred forty-one".