66469423 has 2 divisors, whose sum is σ = 66469424. Its totient is φ = 66469422.

The previous prime is 66469411. The next prime is 66469433. The reversal of 66469423 is 32496466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66469423 - 2²¹ = 64372271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66469433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33234711 + 33234712.

It is an arithmetic number, because the mean of its divisors is an integer number (33234712).

Almost surely, 2^66469423 is an apocalyptic number.

66469423 is a deficient number, since it is larger than the sum of its proper divisors (1).

66469423 is an equidigital number, since it uses as much as digits as its factorization.

66469423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 40.

The square root of 66469423 is about 8152.8782034322. The cubic root of 66469423 is about 405.0798460669.

The spelling of 66469423 in words is "sixty-six million, four hundred sixty-nine thousand, four hundred twenty-three".