82115966 has 8 divisors (see below), whose sum is σ = 123496704. Its totient is φ = 40950400.

The previous prime is 82115963. The next prime is 82115983. The reversal of 82115966 is 66951128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×82115966² = 13486063744226312, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82115963) 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, 52835 + ... + 54366.

It is an arithmetic number, because the mean of its divisors is an integer number (15437088).

Almost surely, 2^82115966 is an apocalyptic number.

82115966 is a deficient number, since it is larger than the sum of its proper divisors (41380738).

82115966 is a wasteful number, since it uses less digits than its factorization.

82115966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107586.

The product of its digits is 25920, while the sum is 38.

The square root of 82115966 is about 9061.7860270479. The cubic root of 82115966 is about 434.6528537907.

The spelling of 82115966 in words is "eighty-two million, one hundred fifteen thousand, nine hundred sixty-six".