6642265896 has 128 divisors (see below), whose sum is σ = 21304416000. Its totient is φ = 1878183936.

The previous prime is 6642265873. The next prime is 6642265919. The reversal of 6642265896 is 6985622466.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6642265873) and next prime (6642265919).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124020 + ... + 169308.

It is an arithmetic number, because the mean of its divisors is an integer number (166440750).

Almost surely, 2^6642265896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6642265896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10652208000).

6642265896 is an abundant number, since it is smaller than the sum of its proper divisors (14662150104).

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

6642265896 is a wasteful number, since it uses less digits than its factorization.

6642265896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45408 (or 45398 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The square root of 6642265896 is about 81500.0975214140. The cubic root of 6642265896 is about 1879.7730501657.

The spelling of 6642265896 in words is "six billion, six hundred forty-two million, two hundred sixty-five thousand, eight hundred ninety-six".