66899222 has 8 divisors (see below), whose sum is σ = 108068016. Its totient is φ = 30876552.

The previous prime is 66899213. The next prime is 66899227. The reversal of 66899222 is 22299866.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66899227) 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, 1286498 + ... + 1286549.

It is an arithmetic number, because the mean of its divisors is an integer number (13508502).

Almost surely, 2^66899222 is an apocalyptic number.

66899222 is a deficient number, since it is larger than the sum of its proper divisors (41168794).

66899222 is a wasteful number, since it uses less digits than its factorization.

66899222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573062.

The product of its digits is 186624, while the sum is 44.

The square root of 66899222 is about 8179.1944591139. The cubic root of 66899222 is about 405.9510687065.

The spelling of 66899222 in words is "sixty-six million, eight hundred ninety-nine thousand, two hundred twenty-two".