7066621 has 4 divisors (see below), whose sum is σ = 7117600. Its totient is φ = 7015644.

The previous prime is 7066573. The next prime is 7066639. The reversal of 7066621 is 1266607.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1266607 = 79 ⋅16033.

It is a cyclic number.

It is not a de Polignac number, because 7066621 - 2¹⁵ = 7033853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7066621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7066321) 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, 25281 + ... + 25558.

It is an arithmetic number, because the mean of its divisors is an integer number (1779400).

Almost surely, 2^7066621 is an apocalyptic number.

It is an amenable number.

7066621 is a deficient number, since it is larger than the sum of its proper divisors (50979).

7066621 is a wasteful number, since it uses less digits than its factorization.

7066621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50978.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 7066621 is about 2658.3116822525. The cubic root of 7066621 is about 191.8980669146.

The spelling of 7066621 in words is "seven million, sixty-six thousand, six hundred twenty-one".