66866627 has 8 divisors (see below), whose sum is σ = 71697600. Its totient is φ = 62135424.

The previous prime is 66866621. The next prime is 66866629. The reversal of 66866627 is 72666866.

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

It is a cyclic number.

It is not a de Polignac number, because 66866627 - 2⁶ = 66866563 is a prime.

It is a super-2 number, since 2×66866627² = 8942291612714258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66866621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23552 + ... + 26237.

It is an arithmetic number, because the mean of its divisors is an integer number (8962200).

Almost surely, 2^66866627 is an apocalyptic number.

66866627 is a deficient number, since it is larger than the sum of its proper divisors (4830973).

66866627 is a wasteful number, since it uses less digits than its factorization.

66866627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49885.

The product of its digits is 870912, while the sum is 47.

The square root of 66866627 is about 8177.2016607150. The cubic root of 66866627 is about 405.8851281058.

The spelling of 66866627 in words is "sixty-six million, eight hundred sixty-six thousand, six hundred twenty-seven".