6641655364253 has 16 divisors (see below), whose sum is σ = 8200131676800. Its totient is φ = 5238359004096.

The previous prime is 6641655364207. The next prime is 6641655364273. The reversal of 6641655364253 is 3524635561466.

It is a cyclic number.

It is not a de Polignac number, because 6641655364253 - 2⁶ = 6641655364189 is a prime.

It is a super-2 number, since 2×6641655364253² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6641655364273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115089803 + ... + 115147496.

It is an arithmetic number, because the mean of its divisors is an integer number (512508229800).

Almost surely, 2^{6641655364253} is an apocalyptic number.

It is an amenable number.

6641655364253 is a deficient number, since it is larger than the sum of its proper divisors (1558476312547).

6641655364253 is a wasteful number, since it uses less digits than its factorization.

6641655364253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230237636.

The product of its digits is 46656000, while the sum is 56.

The spelling of 6641655364253 in words is "six trillion, six hundred forty-one billion, six hundred fifty-five million, three hundred sixty-four thousand, two hundred fifty-three".