660340479 has 8 divisors (see below), whose sum is σ = 881521920. Its totient is φ = 439693016.

The previous prime is 660340453. The next prime is 660340523. The reversal of 660340479 is 974043066.

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

It is a cyclic number.

It is not a de Polignac number, because 660340479 - 2¹³ = 660332287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660340279) 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, 130599 + ... + 135560.

It is an arithmetic number, because the mean of its divisors is an integer number (110190240).

Almost surely, 2^660340479 is an apocalyptic number.

660340479 is a deficient number, since it is larger than the sum of its proper divisors (221181441).

660340479 is a wasteful number, since it uses less digits than its factorization.

660340479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266989.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 660340479 is about 25697.0908664775. The cubic root of 660340479 is about 870.8084610698.

The spelling of 660340479 in words is "six hundred sixty million, three hundred forty thousand, four hundred seventy-nine".