2656682491 has 8 divisors (see below), whose sum is σ = 2678652864. Its totient is φ = 2634749760.

The previous prime is 2656682449. The next prime is 2656682507. The reversal of 2656682491 is 1942866562.

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 2656682491 - 2¹¹ = 2656680443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2656682401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142321 + ... + 159901.

It is an arithmetic number, because the mean of its divisors is an integer number (334831608).

Almost surely, 2^2656682491 is an apocalyptic number.

2656682491 is a deficient number, since it is larger than the sum of its proper divisors (21970373).

2656682491 is a wasteful number, since it uses less digits than its factorization.

2656682491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18821.

The product of its digits is 1244160, while the sum is 49.

The square root of 2656682491 is about 51543.0159284456. The cubic root of 2656682491 is about 1384.9897241045.

The spelling of 2656682491 in words is "two billion, six hundred fifty-six million, six hundred eighty-two thousand, four hundred ninety-one".