66374717 has 4 divisors (see below), whose sum is σ = 66433536. Its totient is φ = 66315900.

The previous prime is 66374713. The next prime is 66374743. The reversal of 66374717 is 71747366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66374717 - 2² = 66374713 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 (66374713) 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, 27683 + ... + 29984.

It is an arithmetic number, because the mean of its divisors is an integer number (16608384).

Almost surely, 2^66374717 is an apocalyptic number.

It is an amenable number.

66374717 is a deficient number, since it is larger than the sum of its proper divisors (58819).

66374717 is a wasteful number, since it uses less digits than its factorization.

66374717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58818.

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

The square root of 66374717 is about 8147.0680002072. The cubic root of 66374717 is about 404.8873679581.

The spelling of 66374717 in words is "sixty-six million, three hundred seventy-four thousand, seven hundred seventeen".