80661280 has 48 divisors (see below), whose sum is σ = 217788480. Its totient is φ = 27654912.

The previous prime is 80661263. The next prime is 80661293. The reversal of 80661280 is 8216608.

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, 34890 + ... + 37129.

It is an arithmetic number, because the mean of its divisors is an integer number (4537260).

Almost surely, 2^80661280 is an apocalyptic number.

80661280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80661280 is an abundant number, since it is smaller than the sum of its proper divisors (137127200).

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

80661280 is a wasteful number, since it uses less digits than its factorization.

80661280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72041 (or 72033 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 80661280 is about 8981.1625082725. The cubic root of 80661280 is about 432.0709188554.

Adding to 80661280 its reverse (8216608), we get a palindrome (88877888).

The spelling of 80661280 in words is "eighty million, six hundred sixty-one thousand, two hundred eighty".