66269140369 has 4 divisors (see below), whose sum is σ = 66270318820. Its totient is φ = 66267961920.

The previous prime is 66269140363. The next prime is 66269140373. The reversal of 66269140369 is 96304196266.

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 34480033344 + 31789107025 = 185688^2 + 178295^2 .

It is a cyclic number.

It is not a de Polignac number, because 66269140369 - 2⁵ = 66269140337 is a prime.

It is a super-2 number, since 2×66269140369² (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 (66269140363) 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, 500412 + ... + 618829.

It is an arithmetic number, because the mean of its divisors is an integer number (16567579705).

Almost surely, 2^66269140369 is an apocalyptic number.

It is an amenable number.

66269140369 is a deficient number, since it is larger than the sum of its proper divisors (1178451).

66269140369 is a wasteful number, since it uses less digits than its factorization.

66269140369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178450.

The product of its (nonzero) digits is 2519424, while the sum is 52.

The spelling of 66269140369 in words is "sixty-six billion, two hundred sixty-nine million, one hundred forty thousand, three hundred sixty-nine".