7445661 has 4 divisors (see below), whose sum is σ = 9927552. Its totient is φ = 4963772.

The previous prime is 7445653. The next prime is 7445687. The reversal of 7445661 is 1665447.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7445661 - 2³ = 7445653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7445161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240941 + ... + 1240946.

It is an arithmetic number, because the mean of its divisors is an integer number (2481888).

Almost surely, 2^7445661 is an apocalyptic number.

It is an amenable number.

7445661 is a deficient number, since it is larger than the sum of its proper divisors (2481891).

7445661 is a wasteful number, since it uses less digits than its factorization.

7445661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481890.

The product of its digits is 20160, while the sum is 33.

The square root of 7445661 is about 2728.6738537246. The cubic root of 7445661 is about 195.2695024410.

The spelling of 7445661 in words is "seven million, four hundred forty-five thousand, six hundred sixty-one".