82668645 has 24 divisors (see below), whose sum is σ = 143520000. Its totient is φ = 44019936.

The previous prime is 82668643. The next prime is 82668659. The reversal of 82668645 is 54686628.

It is not a de Polignac number, because 82668645 - 2¹ = 82668643 is a prime.

It is a super-2 number, since 2×82668645² = 13668209732272050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 82668645.

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 in 23 ways as a sum of consecutive naturals, for example, 40356 + ... + 42354.

It is an arithmetic number, because the mean of its divisors is an integer number (5980000).

Almost surely, 2^82668645 is an apocalyptic number.

It is an amenable number.

82668645 is a deficient number, since it is larger than the sum of its proper divisors (60851355).

82668645 is a wasteful number, since it uses less digits than its factorization.

82668645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929 (or 2926 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 82668645 is about 9092.2299245015. The cubic root of 82668645 is about 435.6258134698.

The spelling of 82668645 in words is "eighty-two million, six hundred sixty-eight thousand, six hundred forty-five".