7201663 has 4 divisors (see below), whose sum is σ = 8230480. Its totient is φ = 6172848.

The previous prime is 7201651. The next prime is 7201673. The reversal of 7201663 is 3661027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3661027 = 457 ⋅8011.

It is a cyclic number.

It is not a de Polignac number, because 7201663 - 2⁵ = 7201631 is a prime.

It is a Duffinian number.

7201663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7201633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514398 + ... + 514411.

It is an arithmetic number, because the mean of its divisors is an integer number (2057620).

Almost surely, 2^7201663 is an apocalyptic number.

7201663 is a deficient number, since it is larger than the sum of its proper divisors (1028817).

7201663 is a wasteful number, since it uses less digits than its factorization.

7201663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028816.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 7201663 is about 2683.5914368622. The cubic root of 7201663 is about 193.1127425253.

The spelling of 7201663 in words is "seven million, two hundred one thousand, six hundred sixty-three".