66450533012415 has 24 divisors (see below), whose sum is σ = 115605945768768. Its totient is φ = 35309508310080.

The previous prime is 66450533012389. The next prime is 66450533012417. The reversal of 66450533012415 is 51421033505466.

It is a happy number.

66450533012415 is a `hidden beast` number, since 6 + 6 + 4 + 50 + 53 + 301 + 241 + 5 = 666.

It is not a de Polignac number, because 66450533012415 - 2⁸ = 66450533012159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66450533012417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2724486904 + ... + 2724511293.

It is an arithmetic number, because the mean of its divisors is an integer number (4816914407032).

Almost surely, 2^{66450533012415} is an apocalyptic number.

66450533012415 is a deficient number, since it is larger than the sum of its proper divisors (49155412756353).

66450533012415 is a wasteful number, since it uses less digits than its factorization.

66450533012415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5448998479 (or 5448998476 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 66450533012415 in words is "sixty-six trillion, four hundred fifty billion, five hundred thirty-three million, twelve thousand, four hundred fifteen".