66071560 has 32 divisors (see below), whose sum is σ = 149659200. Its totient is φ = 26251200.

The previous prime is 66071557. The next prime is 66071573. The reversal of 66071560 is 6517066.

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, 571 + ... + 11509.

It is an arithmetic number, because the mean of its divisors is an integer number (4676850).

Almost surely, 2^66071560 is an apocalyptic number.

It is an amenable number.

66071560 is an abundant number, since it is smaller than the sum of its proper divisors (83587640).

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

66071560 is a wasteful number, since it uses less digits than its factorization.

66071560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11101 (or 11097 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 66071560 is about 8128.4414250212. The cubic root of 66071560 is about 404.2700054365.

The spelling of 66071560 in words is "sixty-six million, seventy-one thousand, five hundred sixty".