660511007 has 8 divisors (see below), whose sum is σ = 712358640. Its totient is φ = 608811840.

The previous prime is 660510997. The next prime is 660511009. The reversal of 660511007 is 700115066.

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

It is not a de Polignac number, because 660511007 - 2¹⁴ = 660494623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660511009) 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, 27782 + ... + 45747.

It is an arithmetic number, because the mean of its divisors is an integer number (89044830).

Almost surely, 2^660511007 is an apocalyptic number.

660511007 is a deficient number, since it is larger than the sum of its proper divisors (51847633).

660511007 is a wasteful number, since it uses less digits than its factorization.

660511007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74233.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 660511007 is about 25700.4086932484. The cubic root of 660511007 is about 870.8834145466.

The spelling of 660511007 in words is "six hundred sixty million, five hundred eleven thousand, seven".