660293401728 has 64 divisors (see below), whose sum is σ = 1754075109600. Its totient is φ = 220076371968.

The previous prime is 660293401727. The next prime is 660293401741. The reversal of 660293401728 is 827104392066.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (660293401727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4143103 + ... + 4299521.

Almost surely, 2^660293401728 is an apocalyptic number.

It is an amenable number.

660293401728 is an abundant number, since it is smaller than the sum of its proper divisors (1093781707872).

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

660293401728 is a wasteful number, since it uses less digits than its factorization.

660293401728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167429 (or 167417 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 660293401728 in words is "six hundred sixty billion, two hundred ninety-three million, four hundred one thousand, seven hundred twenty-eight".