680253661 has 8 divisors (see below), whose sum is σ = 684315648. Its totient is φ = 676200000.

The previous prime is 680253643. The next prime is 680253731. The reversal of 680253661 is 166352086.

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

It is a cyclic number.

It is not a de Polignac number, because 680253661 - 2⁷ = 680253533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 680253661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680253601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241461 + ... + 244261.

It is an arithmetic number, because the mean of its divisors is an integer number (85539456).

Almost surely, 2^680253661 is an apocalyptic number.

It is an amenable number.

680253661 is a deficient number, since it is larger than the sum of its proper divisors (4061987).

680253661 is a wasteful number, since it uses less digits than its factorization.

680253661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 680253661 is about 26081.6728949659. The cubic root of 680253661 is about 879.4752643884.

The spelling of 680253661 in words is "six hundred eighty million, two hundred fifty-three thousand, six hundred sixty-one".