680670999 has 16 divisors (see below), whose sum is σ = 1040931840. Its totient is φ = 439142040.

The previous prime is 680670961. The next prime is 680671003. The reversal of 680670999 is 999076086.

It is not a de Polignac number, because 680670999 - 2⁸ = 680670743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680672999) 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, 405777 + ... + 407450.

It is an arithmetic number, because the mean of its divisors is an integer number (65058240).

Almost surely, 2^680670999 is an apocalyptic number.

680670999 is a deficient number, since it is larger than the sum of its proper divisors (360260841).

680670999 is a wasteful number, since it uses less digits than its factorization.

680670999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813267 (or 813261 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 680670999 is about 26089.6722670102. The cubic root of 680670999 is about 879.6550813375.

The spelling of 680670999 in words is "six hundred eighty million, six hundred seventy thousand, nine hundred ninety-nine".