66465439241256 has 96 divisors (see below), whose sum is σ = 198581624092800. Its totient is φ = 19914738328320.

The previous prime is 66465439241231. The next prime is 66465439241261. The reversal of 66465439241256 is 65214293456466.

66465439241256 is a `hidden beast` number, since 6 + 6 + 4 + 6 + 543 + 9 + 24 + 12 + 56 = 666.

It is a super-2 number, since 2×66465439241256² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66465439241193 and 66465439241202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 471395856 + ... + 471536831.

It is an arithmetic number, because the mean of its divisors is an integer number (2068558584300).

Almost surely, 2^{66465439241256} is an apocalyptic number.

66465439241256 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

66465439241256 is an abundant number, since it is smaller than the sum of its proper divisors (132116184851544).

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

66465439241256 is a wasteful number, since it uses less digits than its factorization.

66465439241256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942932799 (or 942932792 counting only the distinct ones).

The product of its digits is 223948800, while the sum is 63.

The spelling of 66465439241256 in words is "sixty-six trillion, four hundred sixty-five billion, four hundred thirty-nine million, two hundred forty-one thousand, two hundred fifty-six".