73666614426551 has 4 divisors (see below), whose sum is σ = 75233989201632. Its totient is φ = 72099239651472.

The previous prime is 73666614426521. The next prime is 73666614426577. The reversal of 73666614426551 is 15562441666637.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 73666614426551 - 2²⁶ = 73666547317687 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 (73666614426521) 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 3 ways as a sum of consecutive naturals, for example, 783687387470 + ... + 783687387563.

It is an arithmetic number, because the mean of its divisors is an integer number (18808497300408).

Almost surely, 2^{73666614426551} is an apocalyptic number.

73666614426551 is a deficient number, since it is larger than the sum of its proper divisors (1567374775081).

73666614426551 is a wasteful number, since it uses less digits than its factorization.

73666614426551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567374775080.

The product of its digits is 130636800, while the sum is 62.

The spelling of 73666614426551 in words is "seventy-three trillion, six hundred sixty-six billion, six hundred fourteen million, four hundred twenty-six thousand, five hundred fifty-one".