82605658 has 4 divisors (see below), whose sum is σ = 123908490. Its totient is φ = 41302828.

The previous prime is 82605631. The next prime is 82605671. The reversal of 82605658 is 85650628.

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

It can be written as a sum of positive squares in only one way, i.e., 55845729 + 26759929 = 7473^2 + 5173^2 .

It is a super-2 number, since 2×82605658² = 13647389467225928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82605658.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20651413 + ... + 20651416.

Almost surely, 2^82605658 is an apocalyptic number.

82605658 is a deficient number, since it is larger than the sum of its proper divisors (41302832).

82605658 is a wasteful number, since it uses less digits than its factorization.

82605658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41302831.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 82605658 is about 9088.7654827265. The cubic root of 82605658 is about 435.5151478327.

The spelling of 82605658 in words is "eighty-two million, six hundred five thousand, six hundred fifty-eight".