66310193 has 4 divisors (see below), whose sum is σ = 66717168. Its totient is φ = 65903220.

The previous prime is 66310187. The next prime is 66310201. The reversal of 66310193 is 39101366.

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 66310193 - 2⁸ = 66309937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66310103) 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, 203243 + ... + 203568.

It is an arithmetic number, because the mean of its divisors is an integer number (16679292).

Almost surely, 2^66310193 is an apocalyptic number.

It is an amenable number.

66310193 is a deficient number, since it is larger than the sum of its proper divisors (406975).

66310193 is a wasteful number, since it uses less digits than its factorization.

66310193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406974.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 66310193 is about 8143.1070851365. The cubic root of 66310193 is about 404.7561261048.

The spelling of 66310193 in words is "sixty-six million, three hundred ten thousand, one hundred ninety-three".