82642665 has 48 divisors (see below), whose sum is σ = 154802880. Its totient is φ = 37537920.

The previous prime is 82642639. The next prime is 82642667. The reversal of 82642665 is 56624628.

82642665 = 140² + 141² + ... + 630².

It is not a de Polignac number, because 82642665 - 2⁵ = 82642633 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82642667) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 168070 + ... + 168560.

It is an arithmetic number, because the mean of its divisors is an integer number (3225060).

Almost surely, 2^82642665 is an apocalyptic number.

It is an amenable number.

82642665 is a deficient number, since it is larger than the sum of its proper divisors (72160215).

82642665 is a wasteful number, since it uses less digits than its factorization.

82642665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 735 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 82642665 is about 9090.8011198134. The cubic root of 82642665 is about 435.5801744635.

The spelling of 82642665 in words is "eighty-two million, six hundred forty-two thousand, six hundred sixty-five".