82063661 has 2 divisors, whose sum is σ = 82063662. Its totient is φ = 82063660.

The previous prime is 82063643. The next prime is 82063703. The reversal of 82063661 is 16636028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66015625 + 16048036 = 8125^2 + 4006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82063661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82063621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41031830 + 41031831.

It is an arithmetic number, because the mean of its divisors is an integer number (41031831).

Almost surely, 2^82063661 is an apocalyptic number.

It is an amenable number.

82063661 is a deficient number, since it is larger than the sum of its proper divisors (1).

82063661 is an equidigital number, since it uses as much as digits as its factorization.

82063661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 82063661 is about 9058.8995468545. The cubic root of 82063661 is about 434.5605479645.

Adding to 82063661 its reverse (16636028), we get a palindrome (98699689).

The spelling of 82063661 in words is "eighty-two million, sixty-three thousand, six hundred sixty-one".