406667556 has 27 divisors (see below), whose sum is σ = 1028271153. Its totient is φ = 135515520.

The previous prime is 406667537. The next prime is 406667567. The reversal of 406667556 is 655766604.

The square root of 406667556 is 20166.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 305061156 + 101606400 = 17466^2 + 10080^2 .

It is a super-2 number, since 2×406667556² = 330757002206026272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 119316 + ... + 122676.

Almost surely, 2^406667556 is an apocalyptic number.

406667556 is the 20166-th square number.

It is an amenable number.

406667556 is an abundant number, since it is smaller than the sum of its proper divisors (621603597).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

406667556 is an equidigital number, since it uses as much as digits as its factorization.

406667556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6732 (or 3366 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The cubic root of 406667556 is about 740.8776754483.

The spelling of 406667556 in words is "four hundred six million, six hundred sixty-seven thousand, five hundred fifty-six".