82646661 has 4 divisors (see below), whose sum is σ = 110195552. Its totient is φ = 55097772.

The previous prime is 82646657. The next prime is 82646677. The reversal of 82646661 is 16664628.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 82646661 - 2² = 82646657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82646621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13774441 + ... + 13774446.

It is an arithmetic number, because the mean of its divisors is an integer number (27548888).

Almost surely, 2^82646661 is an apocalyptic number.

It is an amenable number.

82646661 is a deficient number, since it is larger than the sum of its proper divisors (27548891).

82646661 is a wasteful number, since it uses less digits than its factorization.

82646661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27548890.

The product of its digits is 82944, while the sum is 39.

The square root of 82646661 is about 9091.0208997670. The cubic root of 82646661 is about 435.5871948499.

The spelling of 82646661 in words is "eighty-two million, six hundred forty-six thousand, six hundred sixty-one".