7986663331 has 16 divisors (see below), whose sum is σ = 8378173440. Its totient is φ = 7604055360.

The previous prime is 7986663323. The next prime is 7986663341. The reversal of 7986663331 is 1333666897.

It is a cyclic number.

It is not a de Polignac number, because 7986663331 - 2³ = 7986663323 is a prime.

It is a super-2 number, since 2×7986663331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7986663341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 943986 + ... + 952408.

It is an arithmetic number, because the mean of its divisors is an integer number (523635840).

Almost surely, 2^7986663331 is an apocalyptic number.

7986663331 is a deficient number, since it is larger than the sum of its proper divisors (391510109).

7986663331 is a wasteful number, since it uses less digits than its factorization.

7986663331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8946.

The product of its digits is 2939328, while the sum is 52.

The square root of 7986663331 is about 89368.1337558304. The cubic root of 7986663331 is about 1998.8879927512.

The spelling of 7986663331 in words is "seven billion, nine hundred eighty-six million, six hundred sixty-three thousand, three hundred thirty-one".