4661505661 has 8 divisors (see below), whose sum is σ = 4750552800. Its totient is φ = 4572499152.

The previous prime is 4661505659. The next prime is 4661505691. The reversal of 4661505661 is 1665051664.

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 4661505661 - 2¹ = 4661505659 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 (4661505691) 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, 326866 + ... + 340828.

It is an arithmetic number, because the mean of its divisors is an integer number (593819100).

Almost surely, 2^4661505661 is an apocalyptic number.

It is an amenable number.

4661505661 is a deficient number, since it is larger than the sum of its proper divisors (89047139).

4661505661 is a wasteful number, since it uses less digits than its factorization.

4661505661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20315.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 4661505661 is about 68275.2199630290. The cubic root of 4661505661 is about 1670.4830449152.

The spelling of 4661505661 in words is "four billion, six hundred sixty-one million, five hundred five thousand, six hundred sixty-one".