82066511 has 4 divisors (see below), whose sum is σ = 82712832. Its totient is φ = 81420192.

The previous prime is 82066469. The next prime is 82066519. The reversal of 82066511 is 11566028.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 82066511 - 2⁶ = 82066447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82066519) 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, 322970 + ... + 323223.

It is an arithmetic number, because the mean of its divisors is an integer number (20678208).

Almost surely, 2^82066511 is an apocalyptic number.

82066511 is a deficient number, since it is larger than the sum of its proper divisors (646321).

82066511 is a wasteful number, since it uses less digits than its factorization.

82066511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646320.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 82066511 is about 9059.0568493635. The cubic root of 82066511 is about 434.5655785437.

The spelling of 82066511 in words is "eighty-two million, sixty-six thousand, five hundred eleven".