66056660 has 24 divisors (see below), whose sum is σ = 143195136. Its totient is φ = 25570080.

The previous prime is 66056659. The next prime is 66056663. The reversal of 66056660 is 6665066.

It is a self number, because there is not a number n which added to its sum of digits gives 66056660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66056663) 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, 52652 + ... + 53891.

It is an arithmetic number, because the mean of its divisors is an integer number (5966464).

Almost surely, 2^66056660 is an apocalyptic number.

It is an amenable number.

66056660 is an abundant number, since it is smaller than the sum of its proper divisors (77138476).

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

66056660 is a wasteful number, since it uses less digits than its factorization.

66056660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106583 (or 106581 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 66056660 is about 8127.5248384733. The cubic root of 66056660 is about 404.2396137625.

The spelling of 66056660 in words is "sixty-six million, fifty-six thousand, six hundred sixty".