40002406664 has 16 divisors (see below), whose sum is σ = 81823104720. Its totient is φ = 18182912080.

The previous prime is 40002406651. The next prime is 40002406667. The reversal of 40002406664 is 46660420004.

It is a self number, because there is not a number n which added to its sum of digits gives 40002406664.

It is not an unprimeable number, because it can be changed into a prime (40002406667) 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, 227286314 + ... + 227286489.

It is an arithmetic number, because the mean of its divisors is an integer number (5113944045).

Almost surely, 2^40002406664 is an apocalyptic number.

40002406664 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40002406664 is an abundant number, since it is smaller than the sum of its proper divisors (41820698056).

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

40002406664 is a wasteful number, since it uses less digits than its factorization.

40002406664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454572820 (or 454572816 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 40002406664 its reverse (46660420004), we get a palindrome (86662826668).

The spelling of 40002406664 in words is "forty billion, two million, four hundred six thousand, six hundred sixty-four".