667422207 has 8 divisors (see below), whose sum is σ = 988773680. Its totient is φ = 444948120.

The previous prime is 667422191. The next prime is 667422271. The reversal of 667422207 is 702224766.

It is not a de Polignac number, because 667422207 - 2⁴ = 667422191 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 (667420207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12359644 + ... + 12359697.

It is an arithmetic number, because the mean of its divisors is an integer number (123596710).

Almost surely, 2^667422207 is an apocalyptic number.

667422207 is a deficient number, since it is larger than the sum of its proper divisors (321351473).

667422207 is a wasteful number, since it uses less digits than its factorization.

667422207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24719350 (or 24719344 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 667422207 is about 25834.5158073458. The cubic root of 667422207 is about 873.9103527836.

The spelling of 667422207 in words is "six hundred sixty-seven million, four hundred twenty-two thousand, two hundred seven".