1661222732 has 24 divisors (see below), whose sum is σ = 3136606032. Its totient is φ = 765288000.

The previous prime is 1661222701. The next prime is 1661222753. The reversal of 1661222732 is 2372221661.

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, 1394 + ... + 57657.

It is an arithmetic number, because the mean of its divisors is an integer number (130691918).

Almost surely, 2^1661222732 is an apocalyptic number.

It is an amenable number.

1661222732 is a deficient number, since it is larger than the sum of its proper divisors (1475383300).

1661222732 is a wasteful number, since it uses less digits than its factorization.

1661222732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59609 (or 59607 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 1661222732 is about 40758.1002010643. The cubic root of 1661222732 is about 1184.3387937749.

The spelling of 1661222732 in words is "one billion, six hundred sixty-one million, two hundred twenty-two thousand, seven hundred thirty-two".