66023566 has 8 divisors (see below), whose sum is σ = 113183280. Its totient is φ = 28295808.

The previous prime is 66023549. The next prime is 66023567. The reversal of 66023566 is 66532066.

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

It is a super-2 number, since 2×66023566² = 8718222534712712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66023567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2357971 + ... + 2357998.

It is an arithmetic number, because the mean of its divisors is an integer number (14147910).

Almost surely, 2^66023566 is an apocalyptic number.

66023566 is a deficient number, since it is larger than the sum of its proper divisors (47159714).

66023566 is a wasteful number, since it uses less digits than its factorization.

66023566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4715978.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 66023566 is about 8125.4886622283. The cubic root of 66023566 is about 404.1720952590.

The spelling of 66023566 in words is "sixty-six million, twenty-three thousand, five hundred sixty-six".