40066033561 has 8 divisors (see below), whose sum is σ = 40204541160. Its totient is φ = 39927593472.

The previous prime is 40066033547. The next prime is 40066033573. The reversal of 40066033561 is 16533066004.

40066033561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3276875536 + 36789158025 = 57244^2 + 191805^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 40066033561 - 2⁵ = 40066033529 is a prime.

It is a super-2 number, since 2×40066033561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40066033531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1365501 + ... + 1394533.

It is an arithmetic number, because the mean of its divisors is an integer number (5025567645).

Almost surely, 2^40066033561 is an apocalyptic number.

It is an amenable number.

40066033561 is a deficient number, since it is larger than the sum of its proper divisors (138507599).

40066033561 is a wasteful number, since it uses less digits than its factorization.

40066033561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33755.

The product of its (nonzero) digits is 38880, while the sum is 34.

Adding to 40066033561 its reverse (16533066004), we get a palindrome (56599099565).

The spelling of 40066033561 in words is "forty billion, sixty-six million, thirty-three thousand, five hundred sixty-one".