3662347221 has 12 divisors (see below), whose sum is σ = 5696984748. Its totient is φ = 2253752064.

The previous prime is 3662347217. The next prime is 3662347237. The reversal of 3662347221 is 1227432663.

3662347221 is a `hidden beast` number, since 3 + 6 + 623 + 4 + 7 + 2 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1311164100 + 2351183121 = 36210^2 + 48489^2 .

It is not a de Polignac number, because 3662347221 - 2² = 3662347217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3662347291) 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, 15650940 + ... + 15651173.

It is an arithmetic number, because the mean of its divisors is an integer number (474748729).

Almost surely, 2^3662347221 is an apocalyptic number.

It is an amenable number.

3662347221 is a deficient number, since it is larger than the sum of its proper divisors (2034637527).

3662347221 is a wasteful number, since it uses less digits than its factorization.

3662347221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31302132 (or 31302129 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 3662347221 is about 60517.3299229237. The cubic root of 3662347221 is about 1541.4159155433.

Adding to 3662347221 its reverse (1227432663), we get a palindrome (4889779884).

The spelling of 3662347221 in words is "three billion, six hundred sixty-two million, three hundred forty-seven thousand, two hundred twenty-one".