82661777 has 8 divisors (see below), whose sum is σ = 90266400. Its totient is φ = 75072160.

The previous prime is 82661759. The next prime is 82661809. The reversal of 82661777 is 77716628.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82661777 - 2⁶ = 82661713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82661377) 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 7 ways as a sum of consecutive naturals, for example, 9974 + ... + 16272.

It is an arithmetic number, because the mean of its divisors is an integer number (11283300).

Almost surely, 2^82661777 is an apocalyptic number.

It is an amenable number.

82661777 is a deficient number, since it is larger than the sum of its proper divisors (7604623).

82661777 is a wasteful number, since it uses less digits than its factorization.

82661777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7503.

The product of its digits is 197568, while the sum is 44.

The square root of 82661777 is about 9091.8522315313. The cubic root of 82661777 is about 435.6137493998.

It can be divided in two parts, 82661 and 777, that added together give a palindrome (83438).

The spelling of 82661777 in words is "eighty-two million, six hundred sixty-one thousand, seven hundred seventy-seven".