40166973829 has 2 divisors, whose sum is σ = 40166973830. Its totient is φ = 40166973828.

The previous prime is 40166973797. The next prime is 40166973929. The reversal of 40166973829 is 92837966104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28867709025 + 11299264804 = 169905^2 + 106298^2 .

It is a cyclic number.

It is not a de Polignac number, because 40166973829 - 2⁵ = 40166973797 is a prime.

It is a super-2 number, since 2×40166973829² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40166973829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40166973529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20083486914 + 20083486915.

It is an arithmetic number, because the mean of its divisors is an integer number (20083486915).

Almost surely, 2^40166973829 is an apocalyptic number.

It is an amenable number.

40166973829 is a deficient number, since it is larger than the sum of its proper divisors (1).

40166973829 is an equidigital number, since it uses as much as digits as its factorization.

40166973829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 40166973829 in words is "forty billion, one hundred sixty-six million, nine hundred seventy-three thousand, eight hundred twenty-nine".