82021861066 has 8 divisors (see below), whose sum is σ = 127001591424. Its totient is φ = 39687997260.

The previous prime is 82021861049. The next prime is 82021861067. The reversal of 82021861066 is 66016812028.

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

It is not an unprimeable number, because it can be changed into a prime (82021861067) 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, 661466560 + ... + 661466683.

It is an arithmetic number, because the mean of its divisors is an integer number (15875198928).

Almost surely, 2^82021861066 is an apocalyptic number.

82021861066 is a deficient number, since it is larger than the sum of its proper divisors (44979730358).

82021861066 is a wasteful number, since it uses less digits than its factorization.

82021861066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322933276.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 82021861066 in words is "eighty-two billion, twenty-one million, eight hundred sixty-one thousand, sixty-six".