406664654 has 16 divisors (see below), whose sum is σ = 678008880. Its totient is φ = 181359360.

The previous prime is 406664653. The next prime is 406664663. The reversal of 406664654 is 456466604.

It is a super-2 number, since 2×406664654² = 330752281625879432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406664653) 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, 173219 + ... + 175550.

It is an arithmetic number, because the mean of its divisors is an integer number (42375555).

Almost surely, 2^406664654 is an apocalyptic number.

406664654 is a deficient number, since it is larger than the sum of its proper divisors (271344226).

406664654 is a wasteful number, since it uses less digits than its factorization.

406664654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348835.

The product of its (nonzero) digits is 414720, while the sum is 41.

The square root of 406664654 is about 20165.9280470798. The cubic root of 406664654 is about 740.8759131307.

The spelling of 406664654 in words is "four hundred six million, six hundred sixty-four thousand, six hundred fifty-four".