66939627 has 8 divisors (see below), whose sum is σ = 92330640. Its totient is φ = 43087520.

The previous prime is 66939617. The next prime is 66939647. The reversal of 66939627 is 72693966.

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 66939627 - 2⁶ = 66939563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66939617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384624 + ... + 384797.

It is an arithmetic number, because the mean of its divisors is an integer number (11541330).

Almost surely, 2^66939627 is an apocalyptic number.

66939627 is a deficient number, since it is larger than the sum of its proper divisors (25391013).

66939627 is a wasteful number, since it uses less digits than its factorization.

66939627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769453.

The product of its digits is 734832, while the sum is 48.

The square root of 66939627 is about 8181.6640727911. The cubic root of 66939627 is about 406.0327794317.

The spelling of 66939627 in words is "sixty-six million, nine hundred thirty-nine thousand, six hundred twenty-seven".