6661134420253 has 4 divisors (see below), whose sum is σ = 6950748960288. Its totient is φ = 6371519880220.

The previous prime is 6661134420251. The next prime is 6661134420277. The reversal of 6661134420253 is 3520244311666.

It is a happy number.

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 6661134420253 - 2¹ = 6661134420251 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 (6661134420251) 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, 144807269983 + ... + 144807270028.

It is an arithmetic number, because the mean of its divisors is an integer number (1737687240072).

Almost surely, 2^{6661134420253} is an apocalyptic number.

It is an amenable number.

6661134420253 is a deficient number, since it is larger than the sum of its proper divisors (289614540035).

6661134420253 is a wasteful number, since it uses less digits than its factorization.

6661134420253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289614540034.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 6661134420253 in words is "six trillion, six hundred sixty-one billion, one hundred thirty-four million, four hundred twenty thousand, two hundred fifty-three".