901668220 has 12 divisors (see below), whose sum is σ = 1893503304. Its totient is φ = 360667280.

The previous prime is 901668197. The next prime is 901668221. The reversal of 901668220 is 22866109.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901668221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22541686 + ... + 22541725.

It is an arithmetic number, because the mean of its divisors is an integer number (157791942).

Almost surely, 2^901668220 is an apocalyptic number.

It is an amenable number.

901668220 is an abundant number, since it is smaller than the sum of its proper divisors (991835084).

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

901668220 is a wasteful number, since it uses less digits than its factorization.

901668220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45083420 (or 45083418 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 901668220 is about 30027.7907945290. The cubic root of 901668220 is about 966.0855529651.

The spelling of 901668220 in words is "nine hundred one million, six hundred sixty-eight thousand, two hundred twenty".