4066622611621 has 16 divisors (see below), whose sum is σ = 4211051703040. Its totient is φ = 3924129551040.

The previous prime is 4066622611619. The next prime is 4066622611631. The reversal of 4066622611621 is 1261162266604.

It is a cyclic number.

It is not a de Polignac number, because 4066622611621 - 2¹ = 4066622611619 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 (4066622611631) 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, 1630510 + ... + 3285088.

It is an arithmetic number, because the mean of its divisors is an integer number (263190731440).

Almost surely, 2^{4066622611621} is an apocalyptic number.

It is an amenable number.

4066622611621 is a deficient number, since it is larger than the sum of its proper divisors (144429091419).

4066622611621 is a wasteful number, since it uses less digits than its factorization.

4066622611621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655164.

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 4066622611621 in words is "four trillion, sixty-six billion, six hundred twenty-two million, six hundred eleven thousand, six hundred twenty-one".