6645767274 has 24 divisors (see below), whose sum is σ = 14437169760. Its totient is φ = 2209408488.

The previous prime is 6645767273. The next prime is 6645767287. The reversal of 6645767274 is 4727675466.

6645767274 is a `hidden beast` number, since 6 + 64 + 576 + 7 + 2 + 7 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 6645767274.

It is not an unprimeable number, because it can be changed into a prime (6645767273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480262 + ... + 493905.

It is an arithmetic number, because the mean of its divisors is an integer number (601548740).

Almost surely, 2^6645767274 is an apocalyptic number.

6645767274 is an abundant number, since it is smaller than the sum of its proper divisors (7791402486).

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

6645767274 is a wasteful number, since it uses less digits than its factorization.

6645767274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974554 (or 974551 counting only the distinct ones).

The product of its digits is 11854080, while the sum is 54.

The square root of 6645767274 is about 81521.5755122532. The cubic root of 6645767274 is about 1880.1032908769.

The spelling of 6645767274 in words is "six billion, six hundred forty-five million, seven hundred sixty-seven thousand, two hundred seventy-four".