681606262 has 16 divisors (see below), whose sum is σ = 1083527280. Its totient is φ = 320466688.

The previous prime is 681606259. The next prime is 681606281. The reversal of 681606262 is 262606186.

It is a super-2 number, since 2×681606262² = 929174192795225288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31914 + ... + 48802.

It is an arithmetic number, because the mean of its divisors is an integer number (67720455).

Almost surely, 2^681606262 is an apocalyptic number.

681606262 is a deficient number, since it is larger than the sum of its proper divisors (401921018).

681606262 is a wasteful number, since it uses less digits than its factorization.

681606262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18095.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 681606262 is about 26107.5901224146. The cubic root of 681606262 is about 880.0577880439.

The spelling of 681606262 in words is "six hundred eighty-one million, six hundred six thousand, two hundred sixty-two".