7407661 has 2 divisors, whose sum is σ = 7407662. Its totient is φ = 7407660.

The previous prime is 7407649. The next prime is 7407671. The reversal of 7407661 is 1667047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5175625 + 2232036 = 2275^2 + 1494^2 .

It is an emirp because it is prime and its reverse (1667047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7407661 - 2¹¹ = 7405613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7407601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3703830 + 3703831.

It is an arithmetic number, because the mean of its divisors is an integer number (3703831).

Almost surely, 2^7407661 is an apocalyptic number.

It is an amenable number.

7407661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7407661 is an equidigital number, since it uses as much as digits as its factorization.

7407661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 7407661 is about 2721.7018572944. The cubic root of 7407661 is about 194.9367403832.

The spelling of 7407661 in words is "seven million, four hundred seven thousand, six hundred sixty-one".