66009883 has 4 divisors (see below), whose sum is σ = 66066408. Its totient is φ = 65953360.

The previous prime is 66009871. The next prime is 66009893. The reversal of 66009883 is 38890066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38890066 = 2 ⋅19445033.

It is a cyclic number.

It is not a de Polignac number, because 66009883 - 2⁹ = 66009371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66009803) 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, 26473 + ... + 28858.

It is an arithmetic number, because the mean of its divisors is an integer number (16516602).

Almost surely, 2^66009883 is an apocalyptic number.

66009883 is a deficient number, since it is larger than the sum of its proper divisors (56525).

66009883 is a wasteful number, since it uses less digits than its factorization.

66009883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56524.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 66009883 is about 8124.6466384699. The cubic root of 66009883 is about 404.1441725580.

The spelling of 66009883 in words is "sixty-six million, nine thousand, eight hundred eighty-three".