66042560 has 28 divisors (see below), whose sum is σ = 157264608. Its totient is φ = 26416896.

The previous prime is 66042553. The next prime is 66042563. The reversal of 66042560 is 6524066.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66042563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102872 + ... + 103511.

Almost surely, 2^66042560 is an apocalyptic number.

It is an amenable number.

66042560 is an abundant number, since it is smaller than the sum of its proper divisors (91222048).

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

66042560 is a wasteful number, since it uses less digits than its factorization.

66042560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206400 (or 206390 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 66042560 is about 8126.6573694232. The cubic root of 66042560 is about 404.2108496472.

The spelling of 66042560 in words is "sixty-six million, forty-two thousand, five hundred sixty".