6652400640 has 88 divisors (see below), whose sum is σ = 21277336800. Its totient is φ = 1773969408.

The previous prime is 6652400617. The next prime is 6652400641. The reversal of 6652400640 is 460042566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6652400641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201190 + ... + 231909.

Almost surely, 2^6652400640 is an apocalyptic number.

6652400640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6652400640 is an abundant number, since it is smaller than the sum of its proper divisors (14624936160).

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

6652400640 is a wasteful number, since it uses less digits than its factorization.

6652400640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433127 (or 433109 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 6652400640 is about 81562.2500915712. The cubic root of 6652400640 is about 1880.7286145178.

The spelling of 6652400640 in words is "six billion, six hundred fifty-two million, four hundred thousand, six hundred forty".