66064600024400 has 30 divisors (see below), whose sum is σ = 158720201559582. Its totient is φ = 26425840009600.

The previous prime is 66064600024373. The next prime is 66064600024441. The reversal of 66064600024400 is 442000646066.

It can be written as a sum of positive squares in 3 ways, for example, as 4683830894656 + 61380769129744 = 2164216^2 + 7834588^2 .

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 82580749631 + ... + 82580750430.

Almost surely, 2^{66064600024400} is an apocalyptic number.

It is an amenable number.

66064600024400 is an abundant number, since it is smaller than the sum of its proper divisors (92655601535182).

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

66064600024400 is a wasteful number, since it uses less digits than its factorization.

66064600024400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165161500079 (or 165161500068 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 66064600024400 in words is "sixty-six trillion, sixty-four billion, six hundred million, twenty-four thousand, four hundred".