7481661 has 16 divisors (see below), whose sum is σ = 10948608. Its totient is φ = 4506800.

The previous prime is 7481653. The next prime is 7481701. The reversal of 7481661 is 1661847.

It is a happy number.

7481661 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 7481661 - 2³ = 7481653 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7481861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5710 + ... + 6896.

It is an arithmetic number, because the mean of its divisors is an integer number (684288).

Almost surely, 2^7481661 is an apocalyptic number.

It is an amenable number.

7481661 is a deficient number, since it is larger than the sum of its proper divisors (3466947).

7481661 is a wasteful number, since it uses less digits than its factorization.

7481661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392.

The product of its digits is 8064, while the sum is 33.

The square root of 7481661 is about 2735.2625102538. The cubic root of 7481661 is about 195.5837079366.

The spelling of 7481661 in words is "seven million, four hundred eighty-one thousand, six hundred sixty-one".