66001523256 has 48 divisors (see below), whose sum is σ = 179109599760. Its totient is φ = 21956757120.

The previous prime is 66001523251. The next prime is 66001523257. The reversal of 66001523256 is 65232510066.

It is a happy number.

66001523256 is a `hidden beast` number, since 6 + 600 + 1 + 5 + 23 + 25 + 6 = 666.

It is a super-2 number, since 2×66001523256² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 66001523256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66001523251) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 875005 + ... + 947436.

It is an arithmetic number, because the mean of its divisors is an integer number (3731449995).

Almost surely, 2^66001523256 is an apocalyptic number.

It is an amenable number.

66001523256 is an abundant number, since it is smaller than the sum of its proper divisors (113108076504).

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

66001523256 is a wasteful number, since it uses less digits than its factorization.

66001523256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822956 (or 1822949 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 66001523256 in words is "sixty-six billion, one million, five hundred twenty-three thousand, two hundred fifty-six".