66744315 has 24 divisors (see below), whose sum is σ = 126208368. Its totient is φ = 32360640.

The previous prime is 66744289. The next prime is 66744317. The reversal of 66744315 is 51344766.

It is a happy number.

It is not a de Polignac number, because 66744315 - 2⁸ = 66744059 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66744315.

It is not an unprimeable number, because it can be changed into a prime (66744317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66924 + ... + 67913.

It is an arithmetic number, because the mean of its divisors is an integer number (5258682).

Almost surely, 2^66744315 is an apocalyptic number.

66744315 is a deficient number, since it is larger than the sum of its proper divisors (59464053).

66744315 is a wasteful number, since it uses less digits than its factorization.

66744315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134859 (or 134856 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 66744315 is about 8169.7193954260. The cubic root of 66744315 is about 405.6374962417.

The spelling of 66744315 in words is "sixty-six million, seven hundred forty-four thousand, three hundred fifteen".