66655060 has 24 divisors (see below), whose sum is σ = 140756616. Its totient is φ = 26513280.

The previous prime is 66655049. The next prime is 66655063. The reversal of 66655060 is 6055666.

It can be written as a sum of positive squares in 4 ways, for example, as 1336336 + 65318724 = 1156^2 + 8082^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66655063) 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, 5587 + ... + 12826.

It is an arithmetic number, because the mean of its divisors is an integer number (5864859).

Almost surely, 2^66655060 is an apocalyptic number.

It is an amenable number.

66655060 is an abundant number, since it is smaller than the sum of its proper divisors (74101556).

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

66655060 is a wasteful number, since it uses less digits than its factorization.

66655060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18603 (or 18601 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 66655060 is about 8164.2550180650. The cubic root of 66655060 is about 405.4566003088.

The spelling of 66655060 in words is "sixty-six million, six hundred fifty-five thousand, sixty".