66223642 has 8 divisors (see below), whose sum is σ = 100118016. Its totient is φ = 32850972.

The previous prime is 66223639. The next prime is 66223681. The reversal of 66223642 is 24632266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130108 + ... + 130615.

It is an arithmetic number, because the mean of its divisors is an integer number (12514752).

Almost surely, 2^66223642 is an apocalyptic number.

66223642 is a deficient number, since it is larger than the sum of its proper divisors (33894374).

66223642 is a wasteful number, since it uses less digits than its factorization.

66223642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260852.

The product of its digits is 20736, while the sum is 31.

The square root of 66223642 is about 8137.7909779006. The cubic root of 66223642 is about 404.5799475580.

The spelling of 66223642 in words is "sixty-six million, two hundred twenty-three thousand, six hundred forty-two".