40646466 has 24 divisors (see below), whose sum is σ = 100648704. Its totient is φ = 11613240.

The previous prime is 40646449. The next prime is 40646467. The reversal of 40646466 is 66464604.

It is a happy number.

40646466 is a `hidden beast` number, since 4 + 0 + 6 + 4 + 646 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40646466.

It is not an unprimeable number, because it can be changed into a prime (40646467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161170 + ... + 161421.

It is an arithmetic number, because the mean of its divisors is an integer number (4193696).

Almost surely, 2^40646466 is an apocalyptic number.

40646466 is an abundant number, since it is smaller than the sum of its proper divisors (60002238).

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

40646466 is a wasteful number, since it uses less digits than its factorization.

40646466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322606 (or 322603 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 40646466 is about 6375.4581011877. The cubic root of 40646466 is about 343.8277542679.

The spelling of 40646466 in words is "forty million, six hundred forty-six thousand, four hundred sixty-six".