3331661 has 2 divisors, whose sum is σ = 3331662. Its totient is φ = 3331660.

The previous prime is 3331651. The next prime is 3331673. The reversal of 3331661 is 1661333.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2464900 + 866761 = 1570^2 + 931^2 .

It is an emirp because it is prime and its reverse (1661333) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3331661 is a prime.

It is a super-2 number, since 2×3331661² = 22199930037842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3331621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1665830 + 1665831.

It is an arithmetic number, because the mean of its divisors is an integer number (1665831).

Almost surely, 2^3331661 is an apocalyptic number.

It is an amenable number.

3331661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3331661 is an equidigital number, since it uses as much as digits as its factorization.

3331661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 23.

The square root of 3331661 is about 1825.2838135479. The cubic root of 3331661 is about 149.3551726979.

Adding to 3331661 its reverse (1661333), we get a palindrome (4992994).

The spelling of 3331661 in words is "three million, three hundred thirty-one thousand, six hundred sixty-one".