9976655491 has 4 divisors (see below), whose sum is σ = 10883624184. Its totient is φ = 9069686800.

The previous prime is 9976655483. The next prime is 9976655537. The reversal of 9976655491 is 1945566799.

9976655491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9976655491 - 2³ = 9976655483 is a prime.

It is a super-2 number, since 2×9976655491² (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 (9976655291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453484330 + ... + 453484351.

It is an arithmetic number, because the mean of its divisors is an integer number (2720906046).

Almost surely, 2^9976655491 is an apocalyptic number.

9976655491 is a deficient number, since it is larger than the sum of its proper divisors (906968693).

9976655491 is a wasteful number, since it uses less digits than its factorization.

9976655491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906968692.

The product of its digits is 18370800, while the sum is 61.

The square root of 9976655491 is about 99883.2092546090. The cubic root of 9976655491 is about 2152.7569097882.

The spelling of 9976655491 in words is "nine billion, nine hundred seventy-six million, six hundred fifty-five thousand, four hundred ninety-one".