680149765 has 8 divisors (see below), whose sum is σ = 842508288. Its totient is φ = 526567440.

The previous prime is 680149739. The next prime is 680149801. The reversal of 680149765 is 567941086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 680149765 - 2⁵ = 680149733 is a prime.

It is a Duffinian number.

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, 2193877 + ... + 2194186.

It is an arithmetic number, because the mean of its divisors is an integer number (105313536).

Almost surely, 2^680149765 is an apocalyptic number.

It is an amenable number.

680149765 is a deficient number, since it is larger than the sum of its proper divisors (162358523).

680149765 is a wasteful number, since it uses less digits than its factorization.

680149765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4388099.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 680149765 is about 26079.6810755040. The cubic root of 680149765 is about 879.4304876531.

The spelling of 680149765 in words is "six hundred eighty million, one hundred forty-nine thousand, seven hundred sixty-five".