66277423 has 4 divisors (see below), whose sum is σ = 66304728. Its totient is φ = 66250120.

The previous prime is 66277403. The next prime is 66277433. The reversal of 66277423 is 32477266.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32477266 = 2 ⋅16238633.

It is a cyclic number.

It is not a de Polignac number, because 66277423 - 2⁵ = 66277391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66277403) 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, 9613 + ... + 14998.

It is an arithmetic number, because the mean of its divisors is an integer number (16576182).

Almost surely, 2^66277423 is an apocalyptic number.

66277423 is a deficient number, since it is larger than the sum of its proper divisors (27305).

66277423 is a wasteful number, since it uses less digits than its factorization.

66277423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27304.

The product of its digits is 84672, while the sum is 37.

The square root of 66277423 is about 8141.0947052592. The cubic root of 66277423 is about 404.6894393044.

The spelling of 66277423 in words is "sixty-six million, two hundred seventy-seven thousand, four hundred twenty-three".