66051564 has 24 divisors (see below), whose sum is σ = 154365120. Its totient is φ = 21982224.

The previous prime is 66051547. The next prime is 66051571. The reversal of 66051564 is 46515066.

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, 4167 + ... + 12225.

It is an arithmetic number, because the mean of its divisors is an integer number (6431880).

Almost surely, 2^66051564 is an apocalyptic number.

It is an amenable number.

66051564 is an abundant number, since it is smaller than the sum of its proper divisors (88313556).

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

66051564 is a wasteful number, since it uses less digits than its factorization.

66051564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8749 (or 8747 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 66051564 is about 8127.2113298474. The cubic root of 66051564 is about 404.2292183532.

The spelling of 66051564 in words is "sixty-six million, fifty-one thousand, five hundred sixty-four".