660263255554 has 16 divisors (see below), whose sum is σ = 1131955992000. Its totient is φ = 282950935344.

The previous prime is 660263255501. The next prime is 660263255579. The reversal of 660263255554 is 455552362066.

It is a junction number, because it is equal to n+sod(n) for n = 660263255498 and 660263255507.

It is an unprimeable number.

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, 1369329 + ... + 1787620.

It is an arithmetic number, because the mean of its divisors is an integer number (70747249500).

Almost surely, 2^660263255554 is an apocalyptic number.

660263255554 is a deficient number, since it is larger than the sum of its proper divisors (471692736446).

660263255554 is a wasteful number, since it uses less digits than its factorization.

660263255554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3171897.

The product of its (nonzero) digits is 6480000, while the sum is 49.

The spelling of 660263255554 in words is "six hundred sixty billion, two hundred sixty-three million, two hundred fifty-five thousand, five hundred fifty-four".