66214564 has 24 divisors (see below), whose sum is σ = 125198528. Its totient is φ = 30460320.

The previous prime is 66214537. The next prime is 66214573. The reversal of 66214564 is 46541266.

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, 15289 + ... + 19135.

Almost surely, 2^66214564 is an apocalyptic number.

It is an amenable number.

66214564 is a deficient number, since it is larger than the sum of its proper divisors (58983964).

66214564 is a wasteful number, since it uses less digits than its factorization.

66214564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195 (or 4193 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 66214564 is about 8137.2331907105. The cubic root of 66214564 is about 404.5614599782.

The spelling of 66214564 in words is "sixty-six million, two hundred fourteen thousand, five hundred sixty-four".