660656046 has 16 divisors (see below), whose sum is σ = 1341033984. Its totient is φ = 216931704.

The previous prime is 660655997. The next prime is 660656081. The reversal of 660656046 is 640656066.

It is a super-2 number, since 2×660656046² = 872932822232708232, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 660655995 and 660656013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821310 + ... + 822113.

It is an arithmetic number, because the mean of its divisors is an integer number (83814624).

Almost surely, 2^660656046 is an apocalyptic number.

660656046 is an abundant number, since it is smaller than the sum of its proper divisors (680377938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660656046 is a wasteful number, since it uses less digits than its factorization.

660656046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643495.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 660656046 is about 25703.2302639182. The cubic root of 660656046 is about 870.9471544964.

The spelling of 660656046 in words is "six hundred sixty million, six hundred fifty-six thousand, forty-six".