66027867833 has 4 divisors (see below), whose sum is σ = 66029943780. Its totient is φ = 66025791888.

The previous prime is 66027867823. The next prime is 66027867863. The reversal of 66027867833 is 33876872066.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33876872066 = 2 ⋅16938436033.

It can be written as a sum of positive squares in 2 ways, for example, as 58405355584 + 7622512249 = 241672^2 + 87307^2 .

It is a cyclic number.

It is not a de Polignac number, because 66027867833 - 2⁶ = 66027867769 is a prime.

It is a super-2 number, since 2×66027867833² (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 (66027867823) 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, 989510 + ... + 1054127.

It is an arithmetic number, because the mean of its divisors is an integer number (16507485945).

Almost surely, 2^66027867833 is an apocalyptic number.

It is an amenable number.

66027867833 is a deficient number, since it is larger than the sum of its proper divisors (2075947).

66027867833 is a wasteful number, since it uses less digits than its factorization.

66027867833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2075946.

The product of its (nonzero) digits is 12192768, while the sum is 56.

The spelling of 66027867833 in words is "sixty-six billion, twenty-seven million, eight hundred sixty-seven thousand, eight hundred thirty-three".