66814741437 has 4 divisors (see below), whose sum is σ = 89086321920. Its totient is φ = 44543160956.

The previous prime is 66814741379. The next prime is 66814741489. The reversal of 66814741437 is 73414741866.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66814741437 - 2¹⁸ = 66814479293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66814741437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66814741237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11135790237 + ... + 11135790242.

It is an arithmetic number, because the mean of its divisors is an integer number (22271580480).

Almost surely, 2^66814741437 is an apocalyptic number.

It is an amenable number.

66814741437 is a deficient number, since it is larger than the sum of its proper divisors (22271580483).

66814741437 is a wasteful number, since it uses less digits than its factorization.

66814741437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22271580482.

The product of its digits is 2709504, while the sum is 51.

The spelling of 66814741437 in words is "sixty-six billion, eight hundred fourteen million, seven hundred forty-one thousand, four hundred thirty-seven".