6642794403 has 24 divisors (see below), whose sum is σ = 10968328800. Its totient is φ = 3795035904.

The previous prime is 6642794401. The next prime is 6642794419. The reversal of 6642794403 is 3044972466.

It is a happy number.

It is not a de Polignac number, because 6642794403 - 2¹ = 6642794401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6642794401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 371083 + ... + 388571.

It is an arithmetic number, because the mean of its divisors is an integer number (457013700).

Almost surely, 2^6642794403 is an apocalyptic number.

6642794403 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

6642794403 is a deficient number, since it is larger than the sum of its proper divisors (4325534397).

6642794403 is a wasteful number, since it uses less digits than its factorization.

6642794403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23531 (or 23528 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The square root of 6642794403 is about 81503.3398272733. The cubic root of 6642794403 is about 1879.8229049834.

The spelling of 6642794403 in words is "six billion, six hundred forty-two million, seven hundred ninety-four thousand, four hundred three".