406972666 has 16 divisors (see below), whose sum is σ = 643001760. Its totient is φ = 192652560.

The previous prime is 406972613. The next prime is 406972669. The reversal of 406972666 is 666279604.

It is a super-2 number, since 2×406972666² = 331253501742295112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (406972669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87840 + ... + 92356.

It is an arithmetic number, because the mean of its divisors is an integer number (40187610).

Almost surely, 2^406972666 is an apocalyptic number.

406972666 is a deficient number, since it is larger than the sum of its proper divisors (236029094).

406972666 is a wasteful number, since it uses less digits than its factorization.

406972666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6909.

The product of its (nonzero) digits is 653184, while the sum is 46.

The square root of 406972666 is about 20173.5635424186. The cubic root of 406972666 is about 741.0629149436.

The spelling of 406972666 in words is "four hundred six million, nine hundred seventy-two thousand, six hundred sixty-six".