61366533147664 has 20 divisors (see below), whose sum is σ = 118897865888956. Its totient is φ = 30683212918272.

The previous prime is 61366533147641. The next prime is 61366533147707. The reversal of 61366533147664 is 46674133566316.

It can be written as a sum of positive squares in 2 ways, for example, as 16741354224400 + 44625178923264 = 4091620^2 + 6680208^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7062532 + ... + 13138204.

Almost surely, 2^{61366533147664} is an apocalyptic number.

It is an amenable number.

61366533147664 is a deficient number, since it is larger than the sum of its proper divisors (57531332741292).

61366533147664 is a wasteful number, since it uses less digits than its factorization.

61366533147664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6706954 (or 6706948 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 61.

The spelling of 61366533147664 in words is "sixty-one trillion, three hundred sixty-six billion, five hundred thirty-three million, one hundred forty-seven thousand, six hundred sixty-four".