679676657 has 12 divisors (see below), whose sum is σ = 775111344. Its totient is φ = 591018120.

The previous prime is 679676633. The next prime is 679676663. The reversal of 679676657 is 756676976.

It is a happy number.

It is not a de Polignac number, because 679676657 - 2⁶ = 679676593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 679676596 and 679676605.

It is not an unprimeable number, because it can be changed into a prime (679676617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52583 + ... + 64220.

It is an arithmetic number, because the mean of its divisors is an integer number (64592612).

Almost surely, 2^679676657 is an apocalyptic number.

It is an amenable number.

679676657 is a deficient number, since it is larger than the sum of its proper divisors (95434687).

679676657 is a wasteful number, since it uses less digits than its factorization.

679676657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116860 (or 116837 counting only the distinct ones).

The product of its digits is 20003760, while the sum is 59.

The square root of 679676657 is about 26070.6090646153. The cubic root of 679676657 is about 879.2265315399.

The spelling of 679676657 in words is "six hundred seventy-nine million, six hundred seventy-six thousand, six hundred fifty-seven".