3837216666 has 32 divisors (see below), whose sum is σ = 7833309120. Its totient is φ = 1252862336.

The previous prime is 3837216637. The next prime is 3837216679. The reversal of 3837216666 is 6666127383.

It is a happy 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, 23560 + ... + 90716.

It is an arithmetic number, because the mean of its divisors is an integer number (244790910).

Almost surely, 2^3837216666 is an apocalyptic number.

3837216666 is an abundant number, since it is smaller than the sum of its proper divisors (3996092454).

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

3837216666 is a wasteful number, since it uses less digits than its factorization.

3837216666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67358.

The product of its digits is 1306368, while the sum is 48.

The square root of 3837216666 is about 61945.2715386736. The cubic root of 3837216666 is about 1565.5686183448.

The spelling of 3837216666 in words is "three billion, eight hundred thirty-seven million, two hundred sixteen thousand, six hundred sixty-six".