981665072 has 20 divisors (see below), whose sum is σ = 1902485376. Its totient is φ = 490701120.

The previous prime is 981665071. The next prime is 981665081. The reversal of 981665072 is 270566189.

It is not an unprimeable number, because it can be changed into a prime (981665071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86513 + ... + 97199.

Almost surely, 2^981665072 is an apocalyptic number.

It is an amenable number.

981665072 is a deficient number, since it is larger than the sum of its proper divisors (920820304).

981665072 is a wasteful number, since it uses less digits than its factorization.

981665072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16436 (or 16430 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 981665072 is about 31331.5347852607. The cubic root of 981665072 is about 993.8506199713.

The spelling of 981665072 in words is "nine hundred eighty-one million, six hundred sixty-five thousand, seventy-two".