681883866 has 32 divisors (see below), whose sum is σ = 1516438080. Its totient is φ = 227123568.

The previous prime is 681883859. The next prime is 681883871. The reversal of 681883866 is 668388186.

It is a super-2 number, since 2×681883866² = 929931213422211912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82285 + ... + 90191.

It is an arithmetic number, because the mean of its divisors is an integer number (47388690).

Almost surely, 2^681883866 is an apocalyptic number.

681883866 is an abundant number, since it is smaller than the sum of its proper divisors (834554214).

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

681883866 is a wasteful number, since it uses less digits than its factorization.

681883866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9515 (or 9509 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The square root of 681883866 is about 26112.9061193886. The cubic root of 681883866 is about 880.1772482153.

The spelling of 681883866 in words is "six hundred eighty-one million, eight hundred eighty-three thousand, eight hundred sixty-six".