6666211356 has 48 divisors (see below), whose sum is σ = 18350008320. Its totient is φ = 1843191360.

The previous prime is 6666211337. The next prime is 6666211367. The reversal of 6666211356 is 6531126666.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1277391 + ... + 1282598.

It is an arithmetic number, because the mean of its divisors is an integer number (382291840).

Almost surely, 2^6666211356 is an apocalyptic number.

It is an amenable number.

6666211356 is an abundant number, since it is smaller than the sum of its proper divisors (11683796964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6666211356 is a wasteful number, since it uses less digits than its factorization.

6666211356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560034 (or 2560032 counting only the distinct ones).

The product of its digits is 233280, while the sum is 42.

The square root of 6666211356 is about 81646.8698481454. The cubic root of 6666211356 is about 1882.0292104124.

The spelling of 6666211356 in words is "six billion, six hundred sixty-six million, two hundred eleven thousand, three hundred fifty-six".