6291402660 has 72 divisors (see below), whose sum is σ = 19093137336. Its totient is φ = 1676897280.

The previous prime is 6291402659. The next prime is 6291402673. The reversal of 6291402660 is 662041926.

6291402660 is a `hidden beast` number, since 629 + 1 + 4 + 0 + 26 + 6 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 748897956 + 5542504704 = 27366^2 + 74448^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 427830 + ... + 442290.

It is an arithmetic number, because the mean of its divisors is an integer number (265182463).

Almost surely, 2^6291402660 is an apocalyptic number.

6291402660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6291402660 is an abundant number, since it is smaller than the sum of its proper divisors (12801734676).

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

6291402660 is a wasteful number, since it uses less digits than its factorization.

6291402660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16893 (or 16888 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6291402660 is about 79318.3626911196. The cubic root of 6291402660 is about 1846.0742328569.

The spelling of 6291402660 in words is "six billion, two hundred ninety-one million, four hundred two thousand, six hundred sixty".