4621910661 has 6 divisors (see below), whose sum is σ = 6676093190. Its totient is φ = 3081273768.

The previous prime is 4621910659. The next prime is 4621910663. The reversal of 4621910661 is 1660191264.

4621910661 is a `hidden beast` number, since 462 + 191 + 0 + 6 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (4621910659) and next prime (4621910663).

It can be written as a sum of positive squares in only one way, i.e., 3790741761 + 831168900 = 61569^2 + 28830^2 .

It is not a de Polignac number, because 4621910661 - 2¹ = 4621910659 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 (4621910663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 256772806 + ... + 256772823.

Almost surely, 2^4621910661 is an apocalyptic number.

It is an amenable number.

4621910661 is a deficient number, since it is larger than the sum of its proper divisors (2054182529).

4621910661 is a wasteful number, since it uses less digits than its factorization.

4621910661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513545635 (or 513545632 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 4621910661 is about 67984.6354774371. The cubic root of 4621910661 is about 1665.7398751611.

The spelling of 4621910661 in words is "four billion, six hundred twenty-one million, nine hundred ten thousand, six hundred sixty-one".