4501661 has 8 divisors (see below), whose sum is σ = 4624344. Its totient is φ = 4380480.

The previous prime is 4501649. The next prime is 4501667. The reversal of 4501661 is 1661054.

It can be written as a sum of positive squares in 4 ways, for example, as 525625 + 3976036 = 725^2 + 1994^2 .

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 4501661 - 2¹⁰ = 4500637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4501667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8051 + ... + 8591.

It is an arithmetic number, because the mean of its divisors is an integer number (578043).

Almost surely, 2^4501661 is an apocalyptic number.

It is an amenable number.

4501661 is a deficient number, since it is larger than the sum of its proper divisors (122683).

4501661 is a wasteful number, since it uses less digits than its factorization.

4501661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 4501661 is about 2121.7118088939. The cubic root of 4501661 is about 165.1166729133.

The spelling of 4501661 in words is "four million, five hundred one thousand, six hundred sixty-one".