640126676 has 12 divisors (see below), whose sum is σ = 1280253408. Its totient is φ = 274339992.

The previous prime is 640126673. The next prime is 640126679. The reversal of 640126676 is 676621046.

640126676 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (640126673) and next prime (640126679).

640126676 is an admirable number.

It is a super-2 number, since 2×640126676² = 819524322653617952, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640126673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11430806 + ... + 11430861.

It is an arithmetic number, because the mean of its divisors is an integer number (106687784).

Almost surely, 2^640126676 is an apocalyptic number.

It is an amenable number.

640126676 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

640126676 is a wasteful number, since it uses less digits than its factorization.

640126676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22861678 (or 22861676 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 640126676 is about 25300.7248117519. The cubic root of 640126676 is about 861.8307295887.

The spelling of 640126676 in words is "six hundred forty million, one hundred twenty-six thousand, six hundred seventy-six".