66733105457 has 4 divisors (see below), whose sum is σ = 66736660980. Its totient is φ = 66729549936.

The previous prime is 66733105399. The next prime is 66733105469. The reversal of 66733105457 is 75450133766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29890606321 + 36842499136 = 172889^2 + 191944^2 .

It is a cyclic number.

It is not a de Polignac number, because 66733105457 - 2³⁰ = 65659363633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66733105057) by changing a digit.

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, 1749458 + ... + 1787195.

It is an arithmetic number, because the mean of its divisors is an integer number (16684165245).

Almost surely, 2^66733105457 is an apocalyptic number.

It is an amenable number.

66733105457 is a deficient number, since it is larger than the sum of its proper divisors (3555523).

66733105457 is a wasteful number, since it uses less digits than its factorization.

66733105457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3555522.

The product of its (nonzero) digits is 1587600, while the sum is 47.

The spelling of 66733105457 in words is "sixty-six billion, seven hundred thirty-three million, one hundred five thousand, four hundred fifty-seven".