660653417 has 4 divisors (see below), whose sum is σ = 666827856. Its totient is φ = 654478980.

The previous prime is 660653407. The next prime is 660653429. The reversal of 660653417 is 714356066.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 660653417 - 2¹² = 660649321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660653407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3087059 + ... + 3087272.

It is an arithmetic number, because the mean of its divisors is an integer number (166706964).

Almost surely, 2^660653417 is an apocalyptic number.

It is an amenable number.

660653417 is a deficient number, since it is larger than the sum of its proper divisors (6174439).

660653417 is a wasteful number, since it uses less digits than its factorization.

660653417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6174438.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 660653417 is about 25703.1791224354. The cubic root of 660653417 is about 870.9459992190.

The spelling of 660653417 in words is "six hundred sixty million, six hundred fifty-three thousand, four hundred seventeen".