80661944 has 16 divisors (see below), whose sum is σ = 164990520. Its totient is φ = 36664480.

The previous prime is 80661929. The next prime is 80661949. The reversal of 80661944 is 44916608.

It is a junction number, because it is equal to n+sod(n) for n = 80661898 and 80661907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80661949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458219 + ... + 458394.

Almost surely, 2^80661944 is an apocalyptic number.

It is an amenable number.

80661944 is an abundant number, since it is smaller than the sum of its proper divisors (84328576).

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

80661944 is a wasteful number, since it uses less digits than its factorization.

80661944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916630 (or 916626 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 80661944 is about 8981.1994744577. The cubic root of 80661944 is about 432.0721044483.

The spelling of 80661944 in words is "eighty million, six hundred sixty-one thousand, nine hundred forty-four".