660780452 has 6 divisors (see below), whose sum is σ = 1156365798. Its totient is φ = 330390224.

The previous prime is 660780431. The next prime is 660780467. The reversal of 660780452 is 254087066.

It is a happy number.

660780452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 421645156 + 239135296 = 20534^2 + 15464^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82597553 + ... + 82597560.

It is an arithmetic number, because the mean of its divisors is an integer number (192727633).

Almost surely, 2^660780452 is an apocalyptic number.

It is an amenable number.

660780452 is a deficient number, since it is larger than the sum of its proper divisors (495585346).

660780452 is a wasteful number, since it uses less digits than its factorization.

660780452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165195117 (or 165195115 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 660780452 is about 25705.6501960172. The cubic root of 660780452 is about 871.0018194778.

The spelling of 660780452 in words is "six hundred sixty million, seven hundred eighty thousand, four hundred fifty-two".