406666156 has 24 divisors (see below), whose sum is σ = 768378800. Its totient is φ = 187209792.

The previous prime is 406666109. The next prime is 406666207. The reversal of 406666156 is 651666604.

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, 10795 + ... + 30493.

Almost surely, 2^406666156 is an apocalyptic number.

It is an amenable number.

406666156 is a deficient number, since it is larger than the sum of its proper divisors (361712644).

406666156 is a wasteful number, since it uses less digits than its factorization.

406666156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20113 (or 20111 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 406666156 is about 20165.9652880788. The cubic root of 406666156 is about 740.8768252617.

The spelling of 406666156 in words is "four hundred six million, six hundred sixty-six thousand, one hundred fifty-six".