66680627 has 4 divisors (see below), whose sum is σ = 71809920. Its totient is φ = 61551336.

The previous prime is 66680591. The next prime is 66680687. The reversal of 66680627 is 72608666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66680627 - 2¹⁰ = 66679603 is a prime.

It is a super-2 number, since 2×66680627² = 8892612034226258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66680687) 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, 2564627 + ... + 2564652.

It is an arithmetic number, because the mean of its divisors is an integer number (17952480).

Almost surely, 2^66680627 is an apocalyptic number.

66680627 is a deficient number, since it is larger than the sum of its proper divisors (5129293).

66680627 is a wasteful number, since it uses less digits than its factorization.

66680627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5129292.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 66680627 is about 8165.8206568599. The cubic root of 66680627 is about 405.5084342519.

The spelling of 66680627 in words is "sixty-six million, six hundred eighty thousand, six hundred twenty-seven".