6106666506621 has 4 divisors (see below), whose sum is σ = 8142222008832. Its totient is φ = 4071111004412.

The previous prime is 6106666506617. The next prime is 6106666506701. The reversal of 6106666506621 is 1266056666016.

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 6106666506621 - 2² = 6106666506617 is a prime.

It is a super-3 number, since 3×6106666506621³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6106666502621) 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, 1017777751101 + ... + 1017777751106.

It is an arithmetic number, because the mean of its divisors is an integer number (2035555502208).

Almost surely, 2^{6106666506621} is an apocalyptic number.

It is an amenable number.

6106666506621 is a deficient number, since it is larger than the sum of its proper divisors (2035555502211).

6106666506621 is a wasteful number, since it uses less digits than its factorization.

6106666506621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035555502210.

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 6106666506621 in words is "six trillion, one hundred six billion, six hundred sixty-six million, five hundred six thousand, six hundred twenty-one".