9976655551 has 4 divisors (see below), whose sum is σ = 10018052704. Its totient is φ = 9935258400.

The previous prime is 9976655537. The next prime is 9976655573. The reversal of 9976655551 is 1555566799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1555566799 = 30241 ⋅51439.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9976655551 is a prime.

It is a super-2 number, since 2×9976655551² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9976655251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20698215 + ... + 20698696.

It is an arithmetic number, because the mean of its divisors is an integer number (2504513176).

Almost surely, 2^9976655551 is an apocalyptic number.

9976655551 is a deficient number, since it is larger than the sum of its proper divisors (41397153).

9976655551 is a wasteful number, since it uses less digits than its factorization.

9976655551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41397152.

The product of its digits is 12757500, while the sum is 58.

The square root of 9976655551 is about 99883.2095549597. The cubic root of 9976655551 is about 2152.7569141038.

The spelling of 9976655551 in words is "nine billion, nine hundred seventy-six million, six hundred fifty-five thousand, five hundred fifty-one".