66614677733 has 4 divisors (see below), whose sum is σ = 66625566828. Its totient is φ = 66603788640.

The previous prime is 66614677721. The next prime is 66614677777. The reversal of 66614677733 is 33777641666.

It is a happy number.

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 2269760164 + 64344917569 = 47642^2 + 253663^2 .

It is a cyclic number.

It is not a de Polignac number, because 66614677733 - 2¹² = 66614673637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66614677783) 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, 5435366 + ... + 5447607.

It is an arithmetic number, because the mean of its divisors is an integer number (16656391707).

Almost surely, 2^66614677733 is an apocalyptic number.

It is an amenable number.

66614677733 is a deficient number, since it is larger than the sum of its proper divisors (10889095).

66614677733 is a wasteful number, since it uses less digits than its factorization.

66614677733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10889094.

The product of its digits is 16003008, while the sum is 56.

The spelling of 66614677733 in words is "sixty-six billion, six hundred fourteen million, six hundred seventy-seven thousand, seven hundred thirty-three".