66892193 has 4 divisors (see below), whose sum is σ = 67120788. Its totient is φ = 66663600.

The previous prime is 66892181. The next prime is 66892207. The reversal of 66892193 is 39129866.

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 52085089 + 14807104 = 7217^2 + 3848^2 .

It is a cyclic number.

It is not a de Polignac number, because 66892193 - 2⁶ = 66892129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66891193) 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, 113858 + ... + 114443.

It is an arithmetic number, because the mean of its divisors is an integer number (16780197).

Almost surely, 2^66892193 is an apocalyptic number.

It is an amenable number.

66892193 is a deficient number, since it is larger than the sum of its proper divisors (228595).

66892193 is a wasteful number, since it uses less digits than its factorization.

66892193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228594.

The product of its digits is 139968, while the sum is 44.

The square root of 66892193 is about 8178.7647600356. The cubic root of 66892193 is about 405.9368506537.

The spelling of 66892193 in words is "sixty-six million, eight hundred ninety-two thousand, one hundred ninety-three".