66654560 has 48 divisors (see below), whose sum is σ = 179970336. Its totient is φ = 22852608.

The previous prime is 66654559. The next prime is 66654563. The reversal of 66654560 is 6545666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66654563) 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, 28637 + ... + 30876.

It is an arithmetic number, because the mean of its divisors is an integer number (3749382).

Almost surely, 2^66654560 is an apocalyptic number.

It is an amenable number.

66654560 is an abundant number, since it is smaller than the sum of its proper divisors (113315776).

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

66654560 is a wasteful number, since it uses less digits than its factorization.

66654560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59535 (or 59527 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 66654560 is about 8164.2243967201. The cubic root of 66654560 is about 405.4555864882.

It can be divided in two parts, 6 and 6654560, that added together give a palindrome (6654566).

The spelling of 66654560 in words is "sixty-six million, six hundred fifty-four thousand, five hundred sixty".