667222007 has 4 divisors (see below), whose sum is σ = 667299720. Its totient is φ = 667144296.

The previous prime is 667221991. The next prime is 667222009. The reversal of 667222007 is 700222766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 667222007 - 2⁴ = 667221991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667222009) 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, 24113 + ... + 43770.

It is an arithmetic number, because the mean of its divisors is an integer number (166824930).

Almost surely, 2^667222007 is an apocalyptic number.

667222007 is a deficient number, since it is larger than the sum of its proper divisors (77713).

667222007 is an equidigital number, since it uses as much as digits as its factorization.

667222007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77712.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 667222007 is about 25830.6408553872. The cubic root of 667222007 is about 873.8229646470.

The spelling of 667222007 in words is "six hundred sixty-seven million, two hundred twenty-two thousand, seven".