66057423 has 4 divisors (see below), whose sum is σ = 88076568. Its totient is φ = 44038280.

The previous prime is 66057421. The next prime is 66057443. The reversal of 66057423 is 32475066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66057423 - 2¹ = 66057421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66057421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11009568 + ... + 11009573.

It is an arithmetic number, because the mean of its divisors is an integer number (22019142).

Almost surely, 2^66057423 is an apocalyptic number.

66057423 is a deficient number, since it is larger than the sum of its proper divisors (22019145).

66057423 is a wasteful number, since it uses less digits than its factorization.

66057423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22019144.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 66057423 is about 8127.5717775975. The cubic root of 66057423 is about 404.2411701719.

It can be divided in two parts, 6605 and 7423, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 66057423 in words is "sixty-six million, fifty-seven thousand, four hundred twenty-three".