681400074 has 24 divisors (see below), whose sum is σ = 1396870560. Its totient is φ = 221590240.

The previous prime is 681400063. The next prime is 681400087. The reversal of 681400074 is 470004186.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23694 + ... + 43865.

It is an arithmetic number, because the mean of its divisors is an integer number (58202940).

Almost surely, 2^681400074 is an apocalyptic number.

681400074 is an abundant number, since it is smaller than the sum of its proper divisors (715470486).

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

681400074 is a wasteful number, since it uses less digits than its factorization.

681400074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67646 (or 67605 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 681400074 is about 26103.6410104031. The cubic root of 681400074 is about 879.9690390278.

The spelling of 681400074 in words is "six hundred eighty-one million, four hundred thousand, seventy-four".