660512090 has 32 divisors (see below), whose sum is σ = 1359915264. Its totient is φ = 226270080.

The previous prime is 660512081. The next prime is 660512093. The reversal of 660512090 is 90215066.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (660512093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98030 + ... + 104550.

It is an arithmetic number, because the mean of its divisors is an integer number (42497352).

Almost surely, 2^660512090 is an apocalyptic number.

660512090 is an abundant number, since it is smaller than the sum of its proper divisors (699403174).

660512090 is a wasteful number, since it uses less digits than its factorization.

660512090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7982.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 660512090 is about 25700.4297629437. The cubic root of 660512090 is about 870.8838905247.

The spelling of 660512090 in words is "six hundred sixty million, five hundred twelve thousand, ninety".