3556266154221 has 16 divisors (see below), whose sum is σ = 5172806852928. Its totient is φ = 2155289452800.

The previous prime is 3556266154219. The next prime is 3556266154241. The reversal of 3556266154221 is 1224516626553.

It is not a de Polignac number, because 3556266154221 - 2¹ = 3556266154219 is a prime.

It is a super-2 number, since 2×3556266154221² (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 (3556266154201) 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, 2797861 + ... + 3865301.

It is an arithmetic number, because the mean of its divisors is an integer number (323300428308).

Almost surely, 2^{3556266154221} is an apocalyptic number.

It is an amenable number.

3556266154221 is a deficient number, since it is larger than the sum of its proper divisors (1616540698707).

3556266154221 is a wasteful number, since it uses less digits than its factorization.

3556266154221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168412.

The product of its digits is 2592000, while the sum is 48.

The spelling of 3556266154221 in words is "three trillion, five hundred fifty-six billion, two hundred sixty-six million, one hundred fifty-four thousand, two hundred twenty-one".