4454320661 has 4 divisors (see below), whose sum is σ = 5090652192. Its totient is φ = 3817989132.

The previous prime is 4454320649. The next prime is 4454320687. The reversal of 4454320661 is 1660234544.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4454320661 is a prime.

It is a super-2 number, since 2×4454320661² = 39681945102022953842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4454320601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318165755 + ... + 318165768.

It is an arithmetic number, because the mean of its divisors is an integer number (1272663048).

Almost surely, 2^4454320661 is an apocalyptic number.

It is an amenable number.

4454320661 is a deficient number, since it is larger than the sum of its proper divisors (636331531).

4454320661 is an equidigital number, since it uses as much as digits as its factorization.

4454320661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636331530.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 4454320661 is about 66740.6971869488. The cubic root of 4454320661 is about 1645.3583241494.

The spelling of 4454320661 in words is "four billion, four hundred fifty-four million, three hundred twenty thousand, six hundred sixty-one".