6646406135773 has 4 divisors (see below), whose sum is σ = 6646417313248. Its totient is φ = 6646394958300.

The previous prime is 6646406135749. The next prime is 6646406135843. The reversal of 6646406135773 is 3775316046466.

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 6646406135773 - 2²¹ = 6646404038621 is a prime.

It is a super-2 number, since 2×6646406135773² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646406135573) 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, 4643511 + ... + 5903812.

It is an arithmetic number, because the mean of its divisors is an integer number (1661604328312).

Almost surely, 2^{6646406135773} is an apocalyptic number.

It is an amenable number.

6646406135773 is a deficient number, since it is larger than the sum of its proper divisors (11177475).

6646406135773 is a wasteful number, since it uses less digits than its factorization.

6646406135773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11177474.

The product of its (nonzero) digits is 45722880, while the sum is 58.

The spelling of 6646406135773 in words is "six trillion, six hundred forty-six billion, four hundred six million, one hundred thirty-five thousand, seven hundred seventy-three".