10665516491 has 8 divisors (see below), whose sum is σ = 12906171360. Its totient is φ = 8604114048.

The previous prime is 10665516479. The next prime is 10665516493. The reversal of 10665516491 is 19461556601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10665516491 - 2¹⁴ = 10665500107 is a prime.

It is a super-2 number, since 2×10665516491² (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 (10665516493) 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 7 ways as a sum of consecutive naturals, for example, 44812976 + ... + 44813213.

It is an arithmetic number, because the mean of its divisors is an integer number (1613271420).

Almost surely, 2^10665516491 is an apocalyptic number.

10665516491 is a deficient number, since it is larger than the sum of its proper divisors (2240654869).

10665516491 is an equidigital number, since it uses as much as digits as its factorization.

10665516491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89626213.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 10665516491 in words is "ten billion, six hundred sixty-five million, five hundred sixteen thousand, four hundred ninety-one".