210710152220661 has 6 divisors (see below), whose sum is σ = 304359108763190. Its totient is φ = 140473434813768.

The previous prime is 210710152220651. The next prime is 210710152220677. The reversal of 210710152220661 is 166022251017012.

210710152220661 is a `hidden beast` number, since 2 + 1 + 0 + 7 + 101 + 522 + 20 + 6 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 199903686012900 + 10806466207761 = 14138730^2 + 3287319^2 .

It is not a de Polignac number, because 210710152220661 - 2⁵ = 210710152220629 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 (210710152220651) 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, 11706119567806 + ... + 11706119567823.

Almost surely, 2^{210710152220661} is an apocalyptic number.

It is an amenable number.

210710152220661 is a deficient number, since it is larger than the sum of its proper divisors (93648956542529).

210710152220661 is a wasteful number, since it uses less digits than its factorization.

210710152220661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23412239135635 (or 23412239135632 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 210710152220661 in words is "two hundred ten trillion, seven hundred ten billion, one hundred fifty-two million, two hundred twenty thousand, six hundred sixty-one".