661203322 has 16 divisors (see below), whose sum is σ = 1068521832. Its totient is φ = 305049600.

The previous prime is 661203311. The next prime is 661203349. The reversal of 661203322 is 223302166.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 571162201 + 90041121 = 23899^2 + 9489^2 .

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, 122178 + ... + 127474.

Almost surely, 2^661203322 is an apocalyptic number.

661203322 is a deficient number, since it is larger than the sum of its proper divisors (407318510).

661203322 is a wasteful number, since it uses less digits than its factorization.

661203322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10113.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 661203322 is about 25713.8741149598. The cubic root of 661203322 is about 871.1875806216.

Adding to 661203322 its reverse (223302166), we get a palindrome (884505488).

The spelling of 661203322 in words is "six hundred sixty-one million, two hundred three thousand, three hundred twenty-two".