681330156 has 24 divisors (see below), whose sum is σ = 1712060784. Its totient is φ = 209640000.

The previous prime is 681330137. The next prime is 681330161. The reversal of 681330156 is 651033186.

It is a super-3 number, since 3×681330156³ (a number of 27 digits) contains 333 as substring.

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, 2183595 + ... + 2183906.

It is an arithmetic number, because the mean of its divisors is an integer number (71335866).

Almost surely, 2^681330156 is an apocalyptic number.

It is an amenable number.

681330156 is an abundant number, since it is smaller than the sum of its proper divisors (1030730628).

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

681330156 is a wasteful number, since it uses less digits than its factorization.

681330156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4367521 (or 4367519 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 681330156 is about 26102.3017375863. The cubic root of 681330156 is about 879.9389403226.

The spelling of 681330156 in words is "six hundred eighty-one million, three hundred thirty thousand, one hundred fifty-six".