2221668387 has 12 divisors (see below), whose sum is σ = 3247741224. Its totient is φ = 1463267040.

The previous prime is 2221668331. The next prime is 2221668403. The reversal of 2221668387 is 7838661222.

It is not a de Polignac number, because 2221668387 - 2¹⁰ = 2221667363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221668287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1486314 + ... + 1487807.

It is an arithmetic number, because the mean of its divisors is an integer number (270645102).

Almost surely, 2^2221668387 is an apocalyptic number.

2221668387 is a deficient number, since it is larger than the sum of its proper divisors (1026072837).

2221668387 is a wasteful number, since it uses less digits than its factorization.

2221668387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974210 (or 2974207 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 2221668387 is about 47134.5774034307. The cubic root of 2221668387 is about 1304.8474618027.

The spelling of 2221668387 in words is "two billion, two hundred twenty-one million, six hundred sixty-eight thousand, three hundred eighty-seven".