660704253 has 8 divisors (see below), whose sum is σ = 961024416. Its totient is φ = 400426800.

The previous prime is 660704251. The next prime is 660704281. The reversal of 660704253 is 352407066.

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

It is not a de Polignac number, because 660704253 - 2¹ = 660704251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 20021341 = 660704253 / (6 + 6 + 0 + 7 + 0 + 4 + 2 + 5 + 3).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660704251) 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, 10010638 + ... + 10010703.

It is an arithmetic number, because the mean of its divisors is an integer number (120128052).

Almost surely, 2^660704253 is an apocalyptic number.

It is an amenable number.

660704253 is a deficient number, since it is larger than the sum of its proper divisors (300320163).

660704253 is a wasteful number, since it uses less digits than its factorization.

660704253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20021355.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 660704253 is about 25704.1680083211. The cubic root of 660704253 is about 870.9683378482.

The spelling of 660704253 in words is "six hundred sixty million, seven hundred four thousand, two hundred fifty-three".