667222794 has 48 divisors (see below), whose sum is σ = 1663159680. Its totient is φ = 189367200.

The previous prime is 667222793. The next prime is 667222811. The reversal of 667222794 is 497222766.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (667222793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1492 + ... + 36560.

It is an arithmetic number, because the mean of its divisors is an integer number (34649160).

Almost surely, 2^667222794 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667222794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (831579840).

667222794 is an abundant number, since it is smaller than the sum of its proper divisors (995936886).

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

667222794 is a wasteful number, since it uses less digits than its factorization.

667222794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35235 (or 35232 counting only the distinct ones).

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

The square root of 667222794 is about 25830.6560892286. The cubic root of 667222794 is about 873.8233082100.

The spelling of 667222794 in words is "six hundred sixty-seven million, two hundred twenty-two thousand, seven hundred ninety-four".