66173313 has 16 divisors (see below), whose sum is σ = 91750400. Its totient is φ = 42377040.

The previous prime is 66173311. The next prime is 66173339. The reversal of 66173313 is 31337166.

It is not a de Polignac number, because 66173313 - 2¹ = 66173311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66173311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10368 + ... + 15486.

It is an arithmetic number, because the mean of its divisors is an integer number (5734400).

Almost surely, 2^66173313 is an apocalyptic number.

It is an amenable number.

66173313 is a deficient number, since it is larger than the sum of its proper divisors (25577087).

66173313 is a wasteful number, since it uses less digits than its factorization.

66173313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292.

The product of its digits is 6804, while the sum is 30.

The square root of 66173313 is about 8134.6980890504. The cubic root of 66173313 is about 404.4774299674.

The spelling of 66173313 in words is "sixty-six million, one hundred seventy-three thousand, three hundred thirteen".