66350660 has 48 divisors (see below), whose sum is σ = 155312640. Its totient is φ = 23662080.

The previous prime is 66350659. The next prime is 66350671. The reversal of 66350660 is 6605366.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1325 + ... + 11595.

It is an arithmetic number, because the mean of its divisors is an integer number (3235680).

Almost surely, 2^66350660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66350660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77656320).

66350660 is an abundant number, since it is smaller than the sum of its proper divisors (88961980).

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

66350660 is a wasteful number, since it uses less digits than its factorization.

66350660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10316 (or 10314 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 66350660 is about 8145.5914456840. The cubic root of 66350660 is about 404.8384459545.

The spelling of 66350660 in words is "sixty-six million, three hundred fifty thousand, six hundred sixty".