6400766754 has 24 divisors (see below), whose sum is σ = 13873494492. Its totient is φ = 2132794080.

The previous prime is 6400766753. The next prime is 6400766803. The reversal of 6400766754 is 4576670046.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6394401225 + 6365529 = 79965^2 + 2523^2 .

It is a super-2 number, since 2×6400766754² = 81939630078223393032, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6400766753) 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, 15529 + ... + 114204.

Almost surely, 2^6400766754 is an apocalyptic number.

6400766754 is an abundant number, since it is smaller than the sum of its proper divisors (7472727738).

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

6400766754 is a wasteful number, since it uses less digits than its factorization.

6400766754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132482 (or 132479 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The square root of 6400766754 is about 80004.7920689755. The cubic root of 6400766754 is about 1856.7096754178.

The spelling of 6400766754 in words is "six billion, four hundred million, seven hundred sixty-six thousand, seven hundred fifty-four".