1661022244 has 24 divisors (see below), whose sum is σ = 3323331648. Its totient is φ = 711590880.

The previous prime is 1661022227. The next prime is 1661022271. The reversal of 1661022244 is 4422201661.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 72954 + ... + 92974.

It is an arithmetic number, because the mean of its divisors is an integer number (138472152).

Almost surely, 2^1661022244 is an apocalyptic number.

1661022244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1661022244 is an abundant number, since it is smaller than the sum of its proper divisors (1662309404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661022244 is a wasteful number, since it uses less digits than its factorization.

1661022244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22995 (or 22993 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1661022244 is about 40755.6406402844. The cubic root of 1661022244 is about 1184.2911470898.

The spelling of 1661022244 in words is "one billion, six hundred sixty-one million, twenty-two thousand, two hundred forty-four".