66573315 has 24 divisors (see below), whose sum is σ = 115584768. Its totient is φ = 35447040.

The previous prime is 66573313. The next prime is 66573361. The reversal of 66573315 is 51337566.

It is a happy number.

It is not a de Polignac number, because 66573315 - 2¹ = 66573313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66573315.

It is not an unprimeable number, because it can be changed into a prime (66573313) 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, 48235 + ... + 49595.

It is an arithmetic number, because the mean of its divisors is an integer number (4816032).

Almost surely, 2^66573315 is an apocalyptic number.

66573315 is a deficient number, since it is larger than the sum of its proper divisors (49011453).

66573315 is a wasteful number, since it uses less digits than its factorization.

66573315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459 (or 2456 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 66573315 is about 8159.2472079230. The cubic root of 66573315 is about 405.2907833991.

The spelling of 66573315 in words is "sixty-six million, five hundred seventy-three thousand, three hundred fifteen".