9910665791 has 32 divisors (see below), whose sum is σ = 11521970880. Its totient is φ = 8447846400.

The previous prime is 9910665781. The next prime is 9910665841. The reversal of 9910665791 is 1975660199.

It is a happy number.

It is a Cunningham number, because it is equal to 2148³-1.

It is a cyclic number.

It is not a de Polignac number, because 9910665791 - 2³⁰ = 8836923967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9910665761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1699661 + ... + 1705481.

It is an arithmetic number, because the mean of its divisors is an integer number (360061590).

Almost surely, 2^9910665791 is an apocalyptic number.

9910665791 is a deficient number, since it is larger than the sum of its proper divisors (1611305089).

9910665791 is a wasteful number, since it uses less digits than its factorization.

9910665791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6027.

The product of its (nonzero) digits is 918540, while the sum is 53.

The square root of 9910665791 is about 99552.3268989731. The cubic root of 9910665791 is about 2147.9999999278. Note that the first 7 decimals are identical.

The spelling of 9910665791 in words is "nine billion, nine hundred ten million, six hundred sixty-five thousand, seven hundred ninety-one".