4621661 has 8 divisors (see below), whose sum is σ = 5059584. Its totient is φ = 4186720.

The previous prime is 4621649. The next prime is 4621679. The reversal of 4621661 is 1661264.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4621661 - 2¹⁸ = 4359517 is a prime.

It is an Ulam number.

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 4621661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4621621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3665 + ... + 4761.

It is an arithmetic number, because the mean of its divisors is an integer number (632448).

Almost surely, 2^4621661 is an apocalyptic number.

It is an amenable number.

4621661 is a deficient number, since it is larger than the sum of its proper divisors (437923).

4621661 is a wasteful number, since it uses less digits than its factorization.

4621661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491.

The product of its digits is 1728, while the sum is 26.

The square root of 4621661 is about 2149.8048748666. The cubic root of 4621661 is about 166.5709881954.

The spelling of 4621661 in words is "four million, six hundred twenty-one thousand, six hundred sixty-one".