7005661 has 16 divisors (see below), whose sum is σ = 8043840. Its totient is φ = 6048000.

The previous prime is 7005643. The next prime is 7005673. The reversal of 7005661 is 1665007.

It is a cyclic number.

It is not a de Polignac number, because 7005661 - 2¹³ = 6997469 is a prime.

7005661 is a Rhonda number in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7005161) 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, 27786 + ... + 28036.

It is an arithmetic number, because the mean of its divisors is an integer number (502740).

Almost surely, 2^7005661 is an apocalyptic number.

It is an amenable number.

7005661 is a deficient number, since it is larger than the sum of its proper divisors (1038179).

7005661 is a wasteful number, since it uses less digits than its factorization.

7005661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 7005661 is about 2646.8209232965. The cubic root of 7005661 is about 191.3446715416.

The spelling of 7005661 in words is "seven million, five thousand, six hundred sixty-one".