66374923 has 4 divisors (see below), whose sum is σ = 69868360. Its totient is φ = 62881488.

The previous prime is 66374911. The next prime is 66374927. The reversal of 66374923 is 32947366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32947366 = 2 ⋅16473683.

It is not a de Polignac number, because 66374923 - 2¹³ = 66366731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66374927) 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, 1746690 + ... + 1746727.

It is an arithmetic number, because the mean of its divisors is an integer number (17467090).

Almost surely, 2^66374923 is an apocalyptic number.

66374923 is a deficient number, since it is larger than the sum of its proper divisors (3493437).

66374923 is a wasteful number, since it uses less digits than its factorization.

66374923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3493436.

The product of its digits is 163296, while the sum is 40.

The square root of 66374923 is about 8147.0806427824. The cubic root of 66374923 is about 404.8877868260.

The spelling of 66374923 in words is "sixty-six million, three hundred seventy-four thousand, nine hundred twenty-three".