40400066993 has 32 divisors (see below), whose sum is σ = 50819892480. Its totient is φ = 31549224960.

The previous prime is 40400066929. The next prime is 40400066999. The reversal of 40400066993 is 39966000404.

It is not a de Polignac number, because 40400066993 - 2⁶ = 40400066929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40400066993.

It is not an unprimeable number, because it can be changed into a prime (40400066999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122996 + ... + 309722.

It is an arithmetic number, because the mean of its divisors is an integer number (1588121640).

Almost surely, 2^40400066993 is an apocalyptic number.

It is an amenable number.

40400066993 is a deficient number, since it is larger than the sum of its proper divisors (10419825487).

40400066993 is a wasteful number, since it uses less digits than its factorization.

40400066993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186857.

The product of its (nonzero) digits is 139968, while the sum is 41.

The spelling of 40400066993 in words is "forty billion, four hundred million, sixty-six thousand, nine hundred ninety-three".