66223194 has 48 divisors (see below), whose sum is σ = 142143456. Its totient is φ = 20563200.

The previous prime is 66223181. The next prime is 66223207. The reversal of 66223194 is 49132266.

It is an interprime number because it is at equal distance from previous prime (66223181) and next prime (66223207).

It is a super-2 number, since 2×66223194² = 8771022847123272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 313749 + ... + 313959.

It is an arithmetic number, because the mean of its divisors is an integer number (2961322).

Almost surely, 2^66223194 is an apocalyptic number.

66223194 is an abundant number, since it is smaller than the sum of its proper divisors (75920262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66223194 is a wasteful number, since it uses less digits than its factorization.

66223194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 414 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 66223194 is about 8137.7634519566. The cubic root of 66223194 is about 404.5790352341.

The spelling of 66223194 in words is "sixty-six million, two hundred twenty-three thousand, one hundred ninety-four".