66943627 has 2 divisors, whose sum is σ = 66943628. Its totient is φ = 66943626.

The previous prime is 66943621. The next prime is 66943691. The reversal of 66943627 is 72634966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66943627 - 2²³ = 58555019 is a prime.

It is not a weakly prime, because it can be changed into another prime (66943621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33471813 + 33471814.

It is an arithmetic number, because the mean of its divisors is an integer number (33471814).

Almost surely, 2^66943627 is an apocalyptic number.

66943627 is a deficient number, since it is larger than the sum of its proper divisors (1).

66943627 is an equidigital number, since it uses as much as digits as its factorization.

66943627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 43.

The square root of 66943627 is about 8181.9085181882. The cubic root of 66943627 is about 406.0408668126.

The spelling of 66943627 in words is "sixty-six million, nine hundred forty-three thousand, six hundred twenty-seven".