66041326144 has 28 divisors (see below), whose sum is σ = 131613235884. Its totient is φ = 32878936064.

The previous prime is 66041326139. The next prime is 66041326177. The reversal of 66041326144 is 44162314066.

It can be written as a sum of positive squares in 2 ways, for example, as 34257567744 + 31783758400 = 185088^2 + 178280^2 .

It is a super-2 number, since 2×66041326144² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2199457 + ... + 2229280.

Almost surely, 2^66041326144 is an apocalyptic number.

66041326144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66041326144 is a deficient number, since it is larger than the sum of its proper divisors (65571909740).

66041326144 is a wasteful number, since it uses less digits than its factorization.

66041326144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428982 (or 4428972 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 66041326144 in words is "sixty-six billion, forty-one million, three hundred twenty-six thousand, one hundred forty-four".