77082077 has 4 divisors (see below), whose sum is σ = 77481660. Its totient is φ = 76682496.

The previous prime is 77082067. The next prime is 77082113. The reversal of 77082077 is 77028077.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17884441 + 59197636 = 4229^2 + 7694^2 .

It is a cyclic number.

It is not a de Polignac number, because 77082077 - 2⁶ = 77082013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77082077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77082067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199502 + ... + 199887.

It is an arithmetic number, because the mean of its divisors is an integer number (19370415).

Almost surely, 2^77082077 is an apocalyptic number.

It is an amenable number.

77082077 is a deficient number, since it is larger than the sum of its proper divisors (399583).

77082077 is a wasteful number, since it uses less digits than its factorization.

77082077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399582.

The product of its (nonzero) digits is 38416, while the sum is 38.

The square root of 77082077 is about 8779.6399128894. The cubic root of 77082077 is about 425.5831938269.

The spelling of 77082077 in words is "seventy-seven million, eighty-two thousand, seventy-seven".