679761680 has 40 divisors (see below), whose sum is σ = 1702021272. Its totient is φ = 250988544.

The previous prime is 679761679. The next prime is 679761749. The reversal of 679761680 is 86167976.

It can be written as a sum of positive squares in 4 ways, for example, as 1263376 + 678498304 = 1124^2 + 26048^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 325769 + ... + 327848.

Almost surely, 2^679761680 is an apocalyptic number.

It is an amenable number.

679761680 is an abundant number, since it is smaller than the sum of its proper divisors (1022259592).

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

679761680 is a wasteful number, since it uses less digits than its factorization.

679761680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653643 (or 653637 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 679761680 is about 26072.2396429612. The cubic root of 679761680 is about 879.2631917958.

The spelling of 679761680 in words is "six hundred seventy-nine million, seven hundred sixty-one thousand, six hundred eighty".