681133870 has 32 divisors (see below), whose sum is σ = 1259515008. Its totient is φ = 265083648.

The previous prime is 681133853. The next prime is 681133879. The reversal of 681133870 is 78331186.

It is a super-2 number, since 2×681133870² = 927886697722353800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681133879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77122 + ... + 85498.

It is an arithmetic number, because the mean of its divisors is an integer number (39359844).

Almost surely, 2^681133870 is an apocalyptic number.

681133870 is a deficient number, since it is larger than the sum of its proper divisors (578381138).

681133870 is a wasteful number, since it uses less digits than its factorization.

681133870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8604.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 681133870 is about 26098.5415301315. The cubic root of 681133870 is about 879.8544309834.

The spelling of 681133870 in words is "six hundred eighty-one million, one hundred thirty-three thousand, eight hundred seventy".