2659942477 has 4 divisors (see below), whose sum is σ = 2660573916. Its totient is φ = 2659311040.

The previous prime is 2659942471. The next prime is 2659942541. The reversal of 2659942477 is 7742499562.

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 1463751081 + 1196191396 = 38259^2 + 34586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2659942477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2659942471) 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, 309358 + ... + 317839.

It is an arithmetic number, because the mean of its divisors is an integer number (665143479).

Almost surely, 2^2659942477 is an apocalyptic number.

It is an amenable number.

2659942477 is a deficient number, since it is larger than the sum of its proper divisors (631439).

2659942477 is an equidigital number, since it uses as much as digits as its factorization.

2659942477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631438.

The product of its digits is 7620480, while the sum is 55.

The square root of 2659942477 is about 51574.6301683299. The cubic root of 2659942477 is about 1385.5559944556. Note that the first 3 decimals are identical.

The spelling of 2659942477 in words is "two billion, six hundred fifty-nine million, nine hundred forty-two thousand, four hundred seventy-seven".