667647352 has 16 divisors (see below), whose sum is σ = 1266922440. Its totient is φ = 329801376.

The previous prime is 667647347. The next prime is 667647371. The reversal of 667647352 is 253746766.

It is a super-2 number, since 2×667647352² = 891505973265223808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502083 + ... + 503410.

Almost surely, 2^667647352 is an apocalyptic number.

It is an amenable number.

667647352 is a deficient number, since it is larger than the sum of its proper divisors (599275088).

667647352 is a wasteful number, since it uses less digits than its factorization.

667647352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005582 (or 1005578 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 46.

The square root of 667647352 is about 25838.8728856349. The cubic root of 667647352 is about 874.0086086423.

The spelling of 667647352 in words is "six hundred sixty-seven million, six hundred forty-seven thousand, three hundred fifty-two".