40006668040 has 16 divisors (see below), whose sum is σ = 90015003180. Its totient is φ = 16002667200.

The previous prime is 40006668011. The next prime is 40006668043. The reversal of 40006668040 is 4086660004.

It can be written as a sum of positive squares in 2 ways, for example, as 39291961284 + 714706756 = 198222^2 + 26734^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40006667987 and 40006668005.

It is not an unprimeable number, because it can be changed into a prime (40006668043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500083311 + ... + 500083390.

Almost surely, 2^40006668040 is an apocalyptic number.

40006668040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40006668040 is an abundant number, since it is smaller than the sum of its proper divisors (50008335140).

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

40006668040 is a wasteful number, since it uses less digits than its factorization.

40006668040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000166712 (or 1000166708 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The spelling of 40006668040 in words is "forty billion, six million, six hundred sixty-eight thousand, forty".