660140080 has 20 divisors (see below), whose sum is σ = 1534825872. Its totient is φ = 264056000.

The previous prime is 660140059. The next prime is 660140083. The reversal of 660140080 is 80041066.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (660140083) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4125796 + ... + 4125955.

Almost surely, 2^660140080 is an apocalyptic number.

It is an amenable number.

660140080 is an abundant number, since it is smaller than the sum of its proper divisors (874685792).

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

660140080 is a wasteful number, since it uses less digits than its factorization.

660140080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8251764 (or 8251758 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 660140080 is about 25693.1913159888. The cubic root of 660140080 is about 870.7203616693.

The spelling of 660140080 in words is "six hundred sixty million, one hundred forty thousand, eighty".