40378004066 has 8 divisors (see below), whose sum is σ = 60570368364. Its totient is φ = 20187881280.

The previous prime is 40378004063. The next prime is 40378004081. The reversal of 40378004066 is 66040087304.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40329074041 + 48930025 = 200821^2 + 6995^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (40378004063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514595 + ... + 587846.

Almost surely, 2^40378004066 is an apocalyptic number.

40378004066 is a deficient number, since it is larger than the sum of its proper divisors (20192364298).

40378004066 is a wasteful number, since it uses less digits than its factorization.

40378004066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120756.

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 40378004066 in words is "forty billion, three hundred seventy-eight million, four thousand, sixty-six".