66012566 has 8 divisors (see below), whose sum is σ = 99895464. Its totient is φ = 32714080.

The previous prime is 66012559. The next prime is 66012577. The reversal of 66012566 is 66521066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145820 + ... + 146271.

It is an arithmetic number, because the mean of its divisors is an integer number (12486933).

Almost surely, 2^66012566 is an apocalyptic number.

66012566 is a deficient number, since it is larger than the sum of its proper divisors (33882898).

66012566 is a wasteful number, since it uses less digits than its factorization.

66012566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292206.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 66012566 is about 8124.8117516654. The cubic root of 66012566 is about 404.1496480216.

The spelling of 66012566 in words is "sixty-six million, twelve thousand, five hundred sixty-six".