7990660997 has 8 divisors (see below), whose sum is σ = 8717737440. Its totient is φ = 7263693360.

The previous prime is 7990660973. The next prime is 7990661027.

7990660997 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 7990660997 - 2¹⁸ = 7990398853 is a prime.

It is a super-3 number, since 3×7990660997³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7990660927) 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, 243779 + ... + 274607.

It is an arithmetic number, because the mean of its divisors is an integer number (1089717180).

Almost surely, 2^7990660997 is an apocalyptic number.

It is an amenable number.

7990660997 is a deficient number, since it is larger than the sum of its proper divisors (727076443).

7990660997 is a wasteful number, since it uses less digits than its factorization.

7990660997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54403.

The product of its (nonzero) digits is 11573604, while the sum is 62.

The square root of 7990660997 is about 89390.4972410379. The cubic root of 7990660997 is about 1999.2214467167.

The spelling of 7990660997 in words is "seven billion, nine hundred ninety million, six hundred sixty thousand, nine hundred ninety-seven".