7091661 has 8 divisors (see below), whose sum is σ = 9469024. Its totient is φ = 4721040.

The previous prime is 7091633. The next prime is 7091663. The reversal of 7091661 is 1661907.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7091661 - 2²² = 2897357 is a prime.

It is a Duffinian number.

7091661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7091663) 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 7 ways as a sum of consecutive naturals, for example, 1806 + ... + 4176.

It is an arithmetic number, because the mean of its divisors is an integer number (1183628).

Almost surely, 2^7091661 is an apocalyptic number.

It is an amenable number.

7091661 is a deficient number, since it is larger than the sum of its proper divisors (2377363).

7091661 is a wasteful number, since it uses less digits than its factorization.

7091661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3371.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 7091661 is about 2663.0172736954. The cubic root of 7091661 is about 192.1244581518.

The spelling of 7091661 in words is "seven million, ninety-one thousand, six hundred sixty-one".