77665640883 has 4 divisors (see below), whose sum is σ = 103554187848. Its totient is φ = 51777093920.

The previous prime is 77665640881. The next prime is 77665640911. The reversal of 77665640883 is 38804656677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38804656677 = 3 ⋅12934885559.

It is a cyclic number.

It is not a de Polignac number, because 77665640883 - 2¹ = 77665640881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77665640881) 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, 12944273478 + ... + 12944273483.

It is an arithmetic number, because the mean of its divisors is an integer number (25888546962).

Almost surely, 2^77665640883 is an apocalyptic number.

77665640883 is a deficient number, since it is larger than the sum of its proper divisors (25888546965).

77665640883 is a wasteful number, since it uses less digits than its factorization.

77665640883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25888546964.

The product of its (nonzero) digits is 40642560, while the sum is 60.

The spelling of 77665640883 in words is "seventy-seven billion, six hundred sixty-five million, six hundred forty thousand, eight hundred eighty-three".