1661263322 has 16 divisors (see below), whose sum is σ = 2519405952. Its totient is φ = 821473920.

The previous prime is 1661263321. The next prime is 1661263337. The reversal of 1661263322 is 2233621661.

It is not an unprimeable number, because it can be changed into a prime (1661263321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402047 + ... + 406157.

It is an arithmetic number, because the mean of its divisors is an integer number (157462872).

Almost surely, 2^1661263322 is an apocalyptic number.

1661263322 is a deficient number, since it is larger than the sum of its proper divisors (858142630).

1661263322 is a wasteful number, since it uses less digits than its factorization.

1661263322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6293.

The product of its digits is 15552, while the sum is 32.

The square root of 1661263322 is about 40758.5981358535. The cubic root of 1661263322 is about 1184.3484396659.

Adding to 1661263322 its reverse (2233621661), we get a palindrome (3894884983).

The spelling of 1661263322 in words is "one billion, six hundred sixty-one million, two hundred sixty-three thousand, three hundred twenty-two".