66040022247 has 16 divisors (see below), whose sum is σ = 94510141920. Its totient is φ = 40869245952.

The previous prime is 66040022239. The next prime is 66040022267. The reversal of 66040022247 is 74222004066.

66040022247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66040022247 - 2³ = 66040022239 is a prime.

It is a super-2 number, since 2×66040022247² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66040022267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8865472 + ... + 8872917.

It is an arithmetic number, because the mean of its divisors is an integer number (5906883870).

Almost surely, 2^66040022247 is an apocalyptic number.

66040022247 is a deficient number, since it is larger than the sum of its proper divisors (28470119673).

66040022247 is a wasteful number, since it uses less digits than its factorization.

66040022247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17738482.

The product of its (nonzero) digits is 32256, while the sum is 33.

The spelling of 66040022247 in words is "sixty-six billion, forty million, twenty-two thousand, two hundred forty-seven".