40666064 has 20 divisors (see below), whose sum is σ = 78940260. Its totient is φ = 20294400.

The previous prime is 40666063. The next prime is 40666081. The reversal of 40666064 is 46066604.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38440000 + 2226064 = 6200^2 + 1492^2 .

It is a super-2 number, since 2×40666064² = 3307457522504192, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 40666064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40666063) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7502 + ... + 11730.

It is an arithmetic number, because the mean of its divisors is an integer number (3947013).

Almost surely, 2^40666064 is an apocalyptic number.

It is an amenable number.

40666064 is a deficient number, since it is larger than the sum of its proper divisors (38274196).

40666064 is a wasteful number, since it uses less digits than its factorization.

40666064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4838 (or 4832 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 40666064 is about 6376.9949035576. The cubic root of 40666064 is about 343.8830051035.

The spelling of 40666064 in words is "forty million, six hundred sixty-six thousand, sixty-four".