2221565066 has 48 divisors (see below), whose sum is σ = 4111176384. Its totient is φ = 878921472.

The previous prime is 2221565041. The next prime is 2221565077. The reversal of 2221565066 is 6605651222.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 666881 + ... + 670203.

It is an arithmetic number, because the mean of its divisors is an integer number (85649508).

Almost surely, 2^2221565066 is an apocalyptic number.

2221565066 is a deficient number, since it is larger than the sum of its proper divisors (1889611318).

2221565066 is a wasteful number, since it uses less digits than its factorization.

2221565066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455 (or 3402 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 2221565066 is about 47133.4813694045. The cubic root of 2221565066 is about 1304.8272337262.

The spelling of 2221565066 in words is "two billion, two hundred twenty-one million, five hundred sixty-five thousand, sixty-six".