4021203666 has 16 divisors (see below), whose sum is σ = 8392077504. Its totient is φ = 1282122864.

The previous prime is 4021203661. The next prime is 4021203673. The reversal of 4021203666 is 6663021204.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4021203661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14569441 + ... + 14569716.

It is an arithmetic number, because the mean of its divisors is an integer number (524504844).

Almost surely, 2^4021203666 is an apocalyptic number.

4021203666 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

4021203666 is an abundant number, since it is smaller than the sum of its proper divisors (4370873838).

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

4021203666 is a wasteful number, since it uses less digits than its factorization.

4021203666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29139185.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 4021203666 is about 63412.9613407228. The cubic root of 4021203666 is about 1590.2010038200.

The spelling of 4021203666 in words is "four billion, twenty-one million, two hundred three thousand, six hundred sixty-six".