82668646 has 4 divisors (see below), whose sum is σ = 124002972. Its totient is φ = 41334322.

The previous prime is 82668643. The next prime is 82668659. The reversal of 82668646 is 64686628.

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

It is a junction number, because it is equal to n+sod(n) for n = 82668596 and 82668605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82668643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20667160 + ... + 20667163.

It is an arithmetic number, because the mean of its divisors is an integer number (31000743).

Almost surely, 2^82668646 is an apocalyptic number.

82668646 is a deficient number, since it is larger than the sum of its proper divisors (41334326).

82668646 is a wasteful number, since it uses less digits than its factorization.

82668646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41334325.

The product of its digits is 663552, while the sum is 46.

The square root of 82668646 is about 9092.2299794935. The cubic root of 82668646 is about 435.6258152263.

The spelling of 82668646 in words is "eighty-two million, six hundred sixty-eight thousand, six hundred forty-six".