680672554 has 8 divisors (see below), whose sum is σ = 1081068228. Its totient is φ = 320316480.

The previous prime is 680672539. The next prime is 680672561. The reversal of 680672554 is 455276086.

It can be written as a sum of positive squares in 2 ways, for example, as 662805025 + 17867529 = 25745^2 + 4227^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 680672554.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10009857 + ... + 10009924.

Almost surely, 2^680672554 is an apocalyptic number.

680672554 is a deficient number, since it is larger than the sum of its proper divisors (400395674).

680672554 is a wasteful number, since it uses less digits than its factorization.

680672554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20019800.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 680672554 is about 26089.7020680574. The cubic root of 680672554 is about 879.6557511974.

The spelling of 680672554 in words is "six hundred eighty million, six hundred seventy-two thousand, five hundred fifty-four".