661122202 has 16 divisors (see below), whose sum is σ = 1068852960. Its totient is φ = 304880112.

The previous prime is 661122181. The next prime is 661122247. The reversal of 661122202 is 202221166.

It is a super-4 number, since 4×661122202⁴ (a number of 36 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23449 + ... + 43267.

It is an arithmetic number, because the mean of its divisors is an integer number (66803310).

Almost surely, 2^661122202 is an apocalyptic number.

661122202 is a deficient number, since it is larger than the sum of its proper divisors (407730758).

661122202 is a wasteful number, since it uses less digits than its factorization.

661122202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21117.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 661122202 is about 25712.2967079956. The cubic root of 661122202 is about 871.1519518297.

Adding to 661122202 its reverse (202221166), we get a palindrome (863343368).

The spelling of 661122202 in words is "six hundred sixty-one million, one hundred twenty-two thousand, two hundred two".