40766722013 has 4 divisors (see below), whose sum is σ = 41761032348. Its totient is φ = 39772411680.

The previous prime is 40766721959. The next prime is 40766722021. The reversal of 40766722013 is 31022766704.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8194413529 + 32572308484 = 90523^2 + 180478^2 .

It is a cyclic number.

It is not a de Polignac number, because 40766722013 - 2¹² = 40766717917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40766722093) 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, 497155106 + ... + 497155187.

It is an arithmetic number, because the mean of its divisors is an integer number (10440258087).

Almost surely, 2^40766722013 is an apocalyptic number.

It is an amenable number.

40766722013 is a deficient number, since it is larger than the sum of its proper divisors (994310335).

40766722013 is an equidigital number, since it uses as much as digits as its factorization.

40766722013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994310334.

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 40766722013 in words is "forty billion, seven hundred sixty-six million, seven hundred twenty-two thousand, thirteen".