40666126065 has 16 divisors (see below), whose sum is σ = 65116310400. Its totient is φ = 21671764352.

The previous prime is 40666126049. The next prime is 40666126117. The reversal of 40666126065 is 56062166604.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40666126065 - 2⁴ = 40666126049 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1032285 + ... + 1070954.

It is an arithmetic number, because the mean of its divisors is an integer number (4069769400).

Almost surely, 2^40666126065 is an apocalyptic number.

It is an amenable number.

40666126065 is a deficient number, since it is larger than the sum of its proper divisors (24450184335).

40666126065 is a wasteful number, since it uses less digits than its factorization.

40666126065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104536.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 40666126065 in words is "forty billion, six hundred sixty-six million, one hundred twenty-six thousand, sixty-five".