82066669 has 4 divisors (see below), whose sum is σ = 82084896. Its totient is φ = 82048444.

The previous prime is 82066657. The next prime is 82066679. The reversal of 82066669 is 96666028.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82066669 - 2⁵ = 82066637 is a prime.

It is a super-2 number, since 2×82066669² = 13469876321511122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82066609) 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, 3072 + ... + 13174.

It is an arithmetic number, because the mean of its divisors is an integer number (20521224).

Almost surely, 2^82066669 is an apocalyptic number.

It is an amenable number.

82066669 is a deficient number, since it is larger than the sum of its proper divisors (18227).

82066669 is a wasteful number, since it uses less digits than its factorization.

82066669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18226.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 82066669 is about 9059.0655699139. The cubic root of 82066669 is about 434.5658574285.

The spelling of 82066669 in words is "eighty-two million, sixty-six thousand, six hundred sixty-nine".