660079609 has 16 divisors (see below), whose sum is σ = 771724800. Its totient is φ = 552812544.

The previous prime is 660079601. The next prime is 660079613. The reversal of 660079609 is 906970066.

It is a happy number.

660079609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 660079609 - 2³ = 660079601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660079601) 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, 251697 + ... + 254305.

It is an arithmetic number, because the mean of its divisors is an integer number (48232800).

Almost surely, 2^660079609 is an apocalyptic number.

It is an amenable number.

660079609 is a deficient number, since it is larger than the sum of its proper divisors (111645191).

660079609 is a wasteful number, since it uses less digits than its factorization.

660079609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 660079609 is about 25692.0144986725. The cubic root of 660079609 is about 870.6937739089.

The spelling of 660079609 in words is "six hundred sixty million, seventy-nine thousand, six hundred nine".