6645425374 has 40 divisors (see below), whose sum is σ = 12134604240. Its totient is φ = 2724166368.

The previous prime is 6645425323. The next prime is 6645425393. The reversal of 6645425374 is 4735245466.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 80362 + ... + 140530.

It is an arithmetic number, because the mean of its divisors is an integer number (303365106).

Almost surely, 2^6645425374 is an apocalyptic number.

6645425374 is a deficient number, since it is larger than the sum of its proper divisors (5489178866).

6645425374 is an equidigital number, since it uses as much as digits as its factorization.

6645425374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60222 (or 60201 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 46.

The square root of 6645425374 is about 81519.4784944065. The cubic root of 6645425374 is about 1880.0710488842.

The spelling of 6645425374 in words is "six billion, six hundred forty-five million, four hundred twenty-five thousand, three hundred seventy-four".