66867716437 has 8 divisors (see below), whose sum is σ = 71259584256. Its totient is φ = 62599563312.

The previous prime is 66867716429. The next prime is 66867716459. The reversal of 66867716437 is 73461776866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66867716437 - 2³ = 66867716429 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 (66867716737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30927558 + ... + 30929719.

It is an arithmetic number, because the mean of its divisors is an integer number (8907448032).

Almost surely, 2^66867716437 is an apocalyptic number.

It is an amenable number.

66867716437 is a deficient number, since it is larger than the sum of its proper divisors (4391867819).

66867716437 is a wasteful number, since it uses less digits than its factorization.

66867716437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61857347.

The product of its digits is 42674688, while the sum is 61.

The spelling of 66867716437 in words is "sixty-six billion, eight hundred sixty-seven million, seven hundred sixteen thousand, four hundred thirty-seven".