202010661 has 24 divisors (see below), whose sum is σ = 295134840. Its totient is φ = 133142400.

The previous prime is 202010659. The next prime is 202010693. The reversal of 202010661 is 166010202.

It is a happy number.

202010661 is a `hidden beast` number, since 2 + 0 + 2 + 0 + 1 + 0 + 661 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 17892900 + 184117761 = 4230^2 + 13569^2 .

It is not a de Polignac number, because 202010661 - 2¹ = 202010659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202010621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 437971 + ... + 438431.

It is an arithmetic number, because the mean of its divisors is an integer number (12297285).

Almost surely, 2^202010661 is an apocalyptic number.

It is an amenable number.

202010661 is a deficient number, since it is larger than the sum of its proper divisors (93124179).

202010661 is a wasteful number, since it uses less digits than its factorization.

202010661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917 (or 914 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 202010661 is about 14213.0454512747. The cubic root of 202010661 is about 586.7567529460.

Adding to 202010661 its reverse (166010202), we get a palindrome (368020863).

The spelling of 202010661 in words is "two hundred two million, ten thousand, six hundred sixty-one".