82110661 has 4 divisors (see below), whose sum is σ = 84759424. Its totient is φ = 79461900.

The previous prime is 82110643. The next prime is 82110671. The reversal of 82110661 is 16601128.

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 82110661 - 2¹⁷ = 81979589 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 (82110641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1324335 + ... + 1324396.

It is an arithmetic number, because the mean of its divisors is an integer number (21189856).

Almost surely, 2^82110661 is an apocalyptic number.

It is an amenable number.

82110661 is a deficient number, since it is larger than the sum of its proper divisors (2648763).

82110661 is a wasteful number, since it uses less digits than its factorization.

82110661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2648762.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 82110661 is about 9061.4933096041. The cubic root of 82110661 is about 434.6434935199.

Adding to 82110661 its reverse (16601128), we get a palindrome (98711789).

The spelling of 82110661 in words is "eighty-two million, one hundred ten thousand, six hundred sixty-one".