82005667 has 4 divisors (see below), whose sum is σ = 82181736. Its totient is φ = 81829600.

The previous prime is 82005641. The next prime is 82005673. The reversal of 82005667 is 76650028.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82005667 is a prime.

It is a super-3 number, since 3×82005667³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82005697) 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, 87334 + ... + 88267.

It is an arithmetic number, because the mean of its divisors is an integer number (20545434).

Almost surely, 2^82005667 is an apocalyptic number.

82005667 is a deficient number, since it is larger than the sum of its proper divisors (176069).

82005667 is a wasteful number, since it uses less digits than its factorization.

82005667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176068.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 82005667 is about 9055.6980404605. The cubic root of 82005667 is about 434.4581565482.

The spelling of 82005667 in words is "eighty-two million, five thousand, six hundred sixty-seven".