680149477 has 16 divisors (see below), whose sum is σ = 795370752. Its totient is φ = 569537280.

The previous prime is 680149469. The next prime is 680149487. The reversal of 680149477 is 774941086.

It is a cyclic number.

It is not a de Polignac number, because 680149477 - 2³ = 680149469 is a prime.

It is a super-2 number, since 2×680149477² = 925206622126747058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680149487) 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, 85608 + ... + 93214.

It is an arithmetic number, because the mean of its divisors is an integer number (49710672).

Almost surely, 2^680149477 is an apocalyptic number.

It is an amenable number.

680149477 is a deficient number, since it is larger than the sum of its proper divisors (115221275).

680149477 is a wasteful number, since it uses less digits than its factorization.

680149477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7908.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 680149477 is about 26079.6755539635. The cubic root of 680149477 is about 879.4303635255.

The spelling of 680149477 in words is "six hundred eighty million, one hundred forty-nine thousand, four hundred seventy-seven".