66350646 has 24 divisors (see below), whose sum is σ = 144569880. Its totient is φ = 21992256.

The previous prime is 66350639. The next prime is 66350659. The reversal of 66350646 is 64605366.

66350646 is a `hidden beast` number, since 6 + 6 + 3 + 5 + 0 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 66350646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7075 + ... + 13518.

It is an arithmetic number, because the mean of its divisors is an integer number (6023745).

Almost surely, 2^66350646 is an apocalyptic number.

66350646 is an abundant number, since it is smaller than the sum of its proper divisors (78219234).

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

66350646 is a wasteful number, since it uses less digits than its factorization.

66350646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20780 (or 20777 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 66350646 is about 8145.5905863234. The cubic root of 66350646 is about 404.8384174809.

The spelling of 66350646 in words is "sixty-six million, three hundred fifty thousand, six hundred forty-six".