667385252 has 24 divisors (see below), whose sum is σ = 1237917240. Its totient is φ = 313735680.

The previous prime is 667385237. The next prime is 667385263. The reversal of 667385252 is 252583766.

It can be written as a sum of positive squares in 4 ways, for example, as 211818916 + 455566336 = 14554^2 + 21344^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68102 + ... + 77282.

It is an arithmetic number, because the mean of its divisors is an integer number (51579885).

Almost surely, 2^667385252 is an apocalyptic number.

It is an amenable number.

667385252 is a deficient number, since it is larger than the sum of its proper divisors (570531988).

667385252 is a wasteful number, since it uses less digits than its factorization.

667385252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10271 (or 10269 counting only the distinct ones).

The product of its digits is 604800, while the sum is 44.

The square root of 667385252 is about 25833.8005721187. The cubic root of 667385252 is about 873.8942230869.

The spelling of 667385252 in words is "six hundred sixty-seven million, three hundred eighty-five thousand, two hundred fifty-two".