4664511661 has 4 divisors (see below), whose sum is σ = 4666690432. Its totient is φ = 4662332892.

The previous prime is 4664511613. The next prime is 4664511667. The reversal of 4664511661 is 1661154664.

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 not a de Polignac number, because 4664511661 - 2¹⁵ = 4664478893 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 (4664511667) 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, 1086171 + ... + 1090456.

It is an arithmetic number, because the mean of its divisors is an integer number (1166672608).

Almost surely, 2^4664511661 is an apocalyptic number.

It is an amenable number.

4664511661 is a deficient number, since it is larger than the sum of its proper divisors (2178771).

4664511661 is a wasteful number, since it uses less digits than its factorization.

4664511661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178770.

The product of its digits is 103680, while the sum is 40.

The square root of 4664511661 is about 68297.2302586276. The cubic root of 4664511661 is about 1670.8420414433.

The spelling of 4664511661 in words is "four billion, six hundred sixty-four million, five hundred eleven thousand, six hundred sixty-one".