66371774 has 24 divisors (see below), whose sum is σ = 122627520. Its totient is φ = 26771136.

The previous prime is 66371759. The next prime is 66371777. The reversal of 66371774 is 47717366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66371777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18254 + ... + 21585.

It is an arithmetic number, because the mean of its divisors is an integer number (5109480).

Almost surely, 2^66371774 is an apocalyptic number.

66371774 is a deficient number, since it is larger than the sum of its proper divisors (56255746).

66371774 is a wasteful number, since it uses less digits than its factorization.

66371774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39872 (or 39865 counting only the distinct ones).

The product of its digits is 148176, while the sum is 41.

The square root of 66371774 is about 8146.8873810800. The cubic root of 66371774 is about 404.8813837461.

The spelling of 66371774 in words is "sixty-six million, three hundred seventy-one thousand, seven hundred seventy-four".