66056560 has 40 divisors (see below), whose sum is σ = 162619056. Its totient is φ = 24867840.

The previous prime is 66056539. The next prime is 66056563. The reversal of 66056560 is 6565066.

66056560 = T₂₆₆ + T₂₆₇ + ... + T₇₄₅.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66056563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22926 + ... + 25645.

Almost surely, 2^66056560 is an apocalyptic number.

It is an amenable number.

66056560 is an abundant number, since it is smaller than the sum of its proper divisors (96562496).

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

66056560 is a wasteful number, since it uses less digits than its factorization.

66056560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48601 (or 48595 counting only the distinct ones).

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

The square root of 66056560 is about 8127.5186865365. The cubic root of 66056560 is about 404.2394097761.

The spelling of 66056560 in words is "sixty-six million, fifty-six thousand, five hundred sixty".