42665363777 has 4 divisors (see below), whose sum is σ = 45175091076. Its totient is φ = 40155636480.

The previous prime is 42665363753. The next prime is 42665363803. The reversal of 42665363777 is 77736356624.

42665363777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 37463925136 + 5201438641 = 193556^2 + 72121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42665363777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42665363737) 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, 1254863624 + ... + 1254863657.

It is an arithmetic number, because the mean of its divisors is an integer number (11293772769).

Almost surely, 2^42665363777 is an apocalyptic number.

It is an amenable number.

42665363777 is a deficient number, since it is larger than the sum of its proper divisors (2509727299).

42665363777 is a wasteful number, since it uses less digits than its factorization.

42665363777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509727298.

The product of its digits is 26671680, while the sum is 56.

The spelling of 42665363777 in words is "forty-two billion, six hundred sixty-five million, three hundred sixty-three thousand, seven hundred seventy-seven".