82555661 has 2 divisors, whose sum is σ = 82555662. Its totient is φ = 82555660.

The previous prime is 82555643. The next prime is 82555687. The reversal of 82555661 is 16655528.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77334436 + 5221225 = 8794^2 + 2285^2 .

It is a cyclic number.

It is not a de Polignac number, because 82555661 - 2⁶ = 82555597 is a prime.

It is equal to p_4809854 and since 82555661 and 4809854 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84555661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41277830 + 41277831.

It is an arithmetic number, because the mean of its divisors is an integer number (41277831).

Almost surely, 2^82555661 is an apocalyptic number.

It is an amenable number.

82555661 is a deficient number, since it is larger than the sum of its proper divisors (1).

82555661 is an equidigital number, since it uses as much as digits as its factorization.

82555661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72000, while the sum is 38.

The square root of 82555661 is about 9086.0145828630. The cubic root of 82555661 is about 435.4272650499.

The spelling of 82555661 in words is "eighty-two million, five hundred fifty-five thousand, six hundred sixty-one".