66715367 has 4 divisors (see below), whose sum is σ = 66917256. Its totient is φ = 66513480.

The previous prime is 66715349. The next prime is 66715381. The reversal of 66715367 is 76351766.

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 66715367 - 2¹⁸ = 66453223 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 (66715567) 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, 100448 + ... + 101109.

It is an arithmetic number, because the mean of its divisors is an integer number (16729314).

Almost surely, 2^66715367 is an apocalyptic number.

66715367 is a deficient number, since it is larger than the sum of its proper divisors (201889).

66715367 is a wasteful number, since it uses less digits than its factorization.

66715367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201888.

The product of its digits is 158760, while the sum is 41.

The square root of 66715367 is about 8167.9475390088. The cubic root of 66715367 is about 405.5788440940.

The spelling of 66715367 in words is "sixty-six million, seven hundred fifteen thousand, three hundred sixty-seven".