66662261413 has 4 divisors (see below), whose sum is σ = 72722467008. Its totient is φ = 60602055820.

The previous prime is 66662261411. The next prime is 66662261429. The reversal of 66662261413 is 31416226666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66662261413 - 2¹ = 66662261411 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 66662261413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66662261411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030102781 + ... + 3030102802.

It is an arithmetic number, because the mean of its divisors is an integer number (18180616752).

Almost surely, 2^66662261413 is an apocalyptic number.

It is an amenable number.

66662261413 is a deficient number, since it is larger than the sum of its proper divisors (6060205595).

66662261413 is a wasteful number, since it uses less digits than its factorization.

66662261413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6060205594.

The product of its digits is 373248, while the sum is 43.

The spelling of 66662261413 in words is "sixty-six billion, six hundred sixty-two million, two hundred sixty-one thousand, four hundred thirteen".