66792193 has 4 divisors (see below), whose sum is σ = 71930068. Its totient is φ = 61654320.

The previous prime is 66792181. The next prime is 66792227. The reversal of 66792193 is 39129766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9290304 + 57501889 = 3048^2 + 7583^2 .

It is not a de Polignac number, because 66792193 - 2²⁵ = 33237761 is a prime.

It is a super-2 number, since 2×66792193² = 8922394091498498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66792493) 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, 2568918 + ... + 2568943.

It is an arithmetic number, because the mean of its divisors is an integer number (17982517).

Almost surely, 2^66792193 is an apocalyptic number.

It is an amenable number.

66792193 is a deficient number, since it is larger than the sum of its proper divisors (5137875).

66792193 is a wasteful number, since it uses less digits than its factorization.

66792193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5137874.

The product of its digits is 122472, while the sum is 43.

The square root of 66792193 is about 8172.6490809284. The cubic root of 66792193 is about 405.7344656495.

The spelling of 66792193 in words is "sixty-six million, seven hundred ninety-two thousand, one hundred ninety-three".