1661443202 has 32 divisors (see below), whose sum is σ = 2646842880. Its totient is φ = 780917760.

The previous prime is 1661443193. The next prime is 1661443211. The reversal of 1661443202 is 2023441661.

It is an interprime number because it is at equal distance from previous prime (1661443193) and next prime (1661443211).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 512924 + ... + 516152.

It is an arithmetic number, because the mean of its divisors is an integer number (82713840).

Almost surely, 2^1661443202 is an apocalyptic number.

1661443202 is a deficient number, since it is larger than the sum of its proper divisors (985399678).

1661443202 is a wasteful number, since it uses less digits than its factorization.

1661443202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3498.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1661443202 is about 40760.8047270905. The cubic root of 1661443202 is about 1184.3911848277.

Adding to 1661443202 its reverse (2023441661), we get a palindrome (3684884863).

The spelling of 1661443202 in words is "one billion, six hundred sixty-one million, four hundred forty-three thousand, two hundred two".