660513226254 has 64 divisors (see below), whose sum is σ = 1533402994176. Its totient is φ = 185764892544.

The previous prime is 660513226181. The next prime is 660513226267. The reversal of 660513226254 is 452622315066.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3778144 + ... + 3949100.

It is an arithmetic number, because the mean of its divisors is an integer number (23959421784).

Almost surely, 2^660513226254 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660513226254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766701497088).

660513226254 is an abundant number, since it is smaller than the sum of its proper divisors (872889767922).

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

660513226254 is a wasteful number, since it uses less digits than its factorization.

660513226254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172409.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 660513226254 in words is "six hundred sixty billion, five hundred thirteen million, two hundred twenty-six thousand, two hundred fifty-four".