667366225 has 24 divisors (see below), whose sum is σ = 870678648. Its totient is φ = 506764800.

The previous prime is 667366213. The next prime is 667366243. The reversal of 667366225 is 522663766.

It can be written as a sum of positive squares in 12 ways, for example, as 410629696 + 256736529 = 20264^2 + 16023^2 .

It is not a de Polignac number, because 667366225 - 2⁷ = 667366097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29127 + ... + 46723.

It is an arithmetic number, because the mean of its divisors is an integer number (36278277).

Almost surely, 2^667366225 is an apocalyptic number.

It is an amenable number.

667366225 is a deficient number, since it is larger than the sum of its proper divisors (203312423).

667366225 is a wasteful number, since it uses less digits than its factorization.

667366225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17685 (or 17680 counting only the distinct ones).

The product of its digits is 544320, while the sum is 43.

The square root of 667366225 is about 25833.4323116383. The cubic root of 667366225 is about 873.8859181669.

The spelling of 667366225 in words is "six hundred sixty-seven million, three hundred sixty-six thousand, two hundred twenty-five".