2666405353 has 4 divisors (see below), whose sum is σ = 2692805508. Its totient is φ = 2640005200.

The previous prime is 2666405351. The next prime is 2666405369. The reversal of 2666405353 is 3535046662.

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 1120107024 + 1546298329 = 33468^2 + 39323^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666405353 - 2¹ = 2666405351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666405351) 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, 13199926 + ... + 13200127.

It is an arithmetic number, because the mean of its divisors is an integer number (673201377).

Almost surely, 2^2666405353 is an apocalyptic number.

It is an amenable number.

2666405353 is a deficient number, since it is larger than the sum of its proper divisors (26400155).

2666405353 is a wasteful number, since it uses less digits than its factorization.

2666405353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26400154.

The product of its (nonzero) digits is 388800, while the sum is 40.

The square root of 2666405353 is about 51637.2477287471. The cubic root of 2666405353 is about 1386.6772510274.

The spelling of 2666405353 in words is "two billion, six hundred sixty-six million, four hundred five thousand, three hundred fifty-three".