660674751 has 8 divisors (see below), whose sum is σ = 960981504. Its totient is φ = 400408920.

The previous prime is 660674731. The next prime is 660674753. The reversal of 660674751 is 157476066.

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

It is not a de Polignac number, because 660674751 - 2¹⁵ = 660641983 is a prime.

It is a super-2 number, since 2×660674751² = 872982253217824002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660674753) 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, 10010191 + ... + 10010256.

It is an arithmetic number, because the mean of its divisors is an integer number (120122688).

Almost surely, 2^660674751 is an apocalyptic number.

660674751 is a deficient number, since it is larger than the sum of its proper divisors (300306753).

660674751 is a wasteful number, since it uses less digits than its factorization.

660674751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20020461.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 660674751 is about 25703.5941261140. The cubic root of 660674751 is about 870.9553740598.

The spelling of 660674751 in words is "six hundred sixty million, six hundred seventy-four thousand, seven hundred fifty-one".