66764423 has 48 divisors (see below), whose sum is σ = 86904576. Its totient is φ = 50561280.

The previous prime is 66764387. The next prime is 66764449. The reversal of 66764423 is 32446766.

It is not a de Polignac number, because 66764423 - 2⁸ = 66764167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66764473) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1552640 + ... + 1552682.

It is an arithmetic number, because the mean of its divisors is an integer number (1810512).

Almost surely, 2^66764423 is an apocalyptic number.

66764423 is a deficient number, since it is larger than the sum of its proper divisors (20140153).

66764423 is a wasteful number, since it uses less digits than its factorization.

66764423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 113 counting only the distinct ones).

The product of its digits is 145152, while the sum is 38.

The square root of 66764423 is about 8170.9499447739. The cubic root of 66764423 is about 405.6782275000.

The spelling of 66764423 in words is "sixty-six million, seven hundred sixty-four thousand, four hundred twenty-three".