66256423 has 2 divisors, whose sum is σ = 66256424. Its totient is φ = 66256422.

The previous prime is 66256397. The next prime is 66256427. The reversal of 66256423 is 32465266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66256423 - 2⁵ = 66256391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66256427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33128211 + 33128212.

It is an arithmetic number, because the mean of its divisors is an integer number (33128212).

Almost surely, 2^66256423 is an apocalyptic number.

66256423 is a deficient number, since it is larger than the sum of its proper divisors (1).

66256423 is an equidigital number, since it uses as much as digits as its factorization.

66256423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 34.

The square root of 66256423 is about 8139.8048502406. The cubic root of 66256423 is about 404.6466928427.

The spelling of 66256423 in words is "sixty-six million, two hundred fifty-six thousand, four hundred twenty-three".