82077668 has 6 divisors (see below), whose sum is σ = 143635926. Its totient is φ = 41038832.

The previous prime is 82077647. The next prime is 82077679. The reversal of 82077668 is 86677028.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 55472704 + 26604964 = 7448^2 + 5158^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10259705 + ... + 10259712.

It is an arithmetic number, because the mean of its divisors is an integer number (23939321).

Almost surely, 2^82077668 is an apocalyptic number.

It is an amenable number.

82077668 is a deficient number, since it is larger than the sum of its proper divisors (61558258).

82077668 is a wasteful number, since it uses less digits than its factorization.

82077668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20519421 (or 20519419 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 82077668 is about 9059.6726210167. The cubic root of 82077668 is about 434.5852708168.

The spelling of 82077668 in words is "eighty-two million, seventy-seven thousand, six hundred sixty-eight".