7966898939 has 4 divisors (see below), whose sum is σ = 8025051624. Its totient is φ = 7908746256.

The previous prime is 7966898851. The next prime is 7966898957. The reversal of 7966898939 is 9398986697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9398986697 = 6761 ⋅1390177.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7966898939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7966898959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29076137 + ... + 29076410.

It is an arithmetic number, because the mean of its divisors is an integer number (2006262906).

Almost surely, 2^7966898939 is an apocalyptic number.

7966898939 is a deficient number, since it is larger than the sum of its proper divisors (58152685).

7966898939 is a wasteful number, since it uses less digits than its factorization.

7966898939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58152684.

The product of its digits is 317447424, while the sum is 74.

The square root of 7966898939 is about 89257.4867392086. The cubic root of 7966898939 is about 1997.2377650353.

The spelling of 7966898939 in words is "seven billion, nine hundred sixty-six million, eight hundred ninety-eight thousand, nine hundred thirty-nine".