680746624 has 16 divisors (see below), whose sum is σ = 1356175170. Its totient is φ = 340373248.

The previous prime is 680746607. The next prime is 680746643. The reversal of 680746624 is 426647086.

It can be written as a sum of positive squares in only one way, i.e., 532686400 + 148060224 = 23080^2 + 12168^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2659039 + ... + 2659294.

Almost surely, 2^680746624 is an apocalyptic number.

680746624 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

680746624 is a deficient number, since it is larger than the sum of its proper divisors (675428546).

680746624 is an equidigital number, since it uses as much as digits as its factorization.

680746624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5318347 (or 5318335 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 680746624 is about 26091.1215550424. The cubic root of 680746624 is about 879.6876577472.

The spelling of 680746624 in words is "six hundred eighty million, seven hundred forty-six thousand, six hundred twenty-four".