66622560 has 48 divisors (see below), whose sum is σ = 209862576. Its totient is φ = 17765888.

The previous prime is 66622511. The next prime is 66622573. The reversal of 66622560 is 6522666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68919 + ... + 69878.

It is an arithmetic number, because the mean of its divisors is an integer number (4372137).

Almost surely, 2^66622560 is an apocalyptic number.

66622560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66622560 is an abundant number, since it is smaller than the sum of its proper divisors (143240016).

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

66622560 is a wasteful number, since it uses less digits than its factorization.

66622560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138815 (or 138807 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 66622560 is about 8162.2643916992. The cubic root of 66622560 is about 405.3906914251.

The spelling of 66622560 in words is "sixty-six million, six hundred twenty-two thousand, five hundred sixty".