6664002642 has 72 divisors (see below), whose sum is σ = 16107834288. Its totient is φ = 1989210960.

The previous prime is 6664002641. The next prime is 6664002673. The reversal of 6664002642 is 2462004666.

It is a junction number, because it is equal to n+sod(n) for n = 6664002597 and 6664002606.

It is not an unprimeable number, because it can be changed into a prime (6664002641) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 123093 + ... + 168759.

Almost surely, 2^6664002642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6664002642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8053917144).

6664002642 is an abundant number, since it is smaller than the sum of its proper divisors (9443831646).

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

6664002642 is a wasteful number, since it uses less digits than its factorization.

6664002642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45764 (or 45750 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 6664002642 is about 81633.3427099491. The cubic root of 6664002642 is about 1881.8213300425.

The spelling of 6664002642 in words is "six billion, six hundred sixty-four million, two thousand, six hundred forty-two".