6642345340 has 12 divisors (see below), whose sum is σ = 13948925256. Its totient is φ = 2656938128.

The previous prime is 6642345319. The next prime is 6642345371. The reversal of 6642345340 is 435432466.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6642345340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166058614 + ... + 166058653.

It is an arithmetic number, because the mean of its divisors is an integer number (1162410438).

Almost surely, 2^6642345340 is an apocalyptic number.

It is an amenable number.

6642345340 is an abundant number, since it is smaller than the sum of its proper divisors (7306579916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6642345340 is a wasteful number, since it uses less digits than its factorization.

6642345340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332117276 (or 332117274 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 37.

The square root of 6642345340 is about 81500.5849058766. The cubic root of 6642345340 is about 1879.7805444002.

The spelling of 6642345340 in words is "six billion, six hundred forty-two million, three hundred forty-five thousand, three hundred forty".