667497222 has 24 divisors (see below), whose sum is σ = 1652850576. Its totient is φ = 190713456.

The previous prime is 667497217. The next prime is 667497223. The reversal of 667497222 is 222794766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667497223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2648673 + ... + 2648924.

It is an arithmetic number, because the mean of its divisors is an integer number (68868774).

Almost surely, 2^667497222 is an apocalyptic number.

667497222 is an abundant number, since it is smaller than the sum of its proper divisors (985353354).

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

667497222 is a wasteful number, since it uses less digits than its factorization.

667497222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5297612 (or 5297609 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 667497222 is about 25835.9676033239. The cubic root of 667497222 is about 873.9430926437.

The spelling of 667497222 in words is "six hundred sixty-seven million, four hundred ninety-seven thousand, two hundred twenty-two".