66734440111 has 8 divisors (see below), whose sum is σ = 68516444304. Its totient is φ = 64959785280.

The previous prime is 66734440103. The next prime is 66734440121. The reversal of 66734440111 is 11104443766.

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

It is a cyclic number.

It is not a de Polignac number, because 66734440111 - 2³ = 66734440103 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 (66734440121) 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, 1818936 + ... + 1855261.

It is an arithmetic number, because the mean of its divisors is an integer number (8564555538).

Almost surely, 2^66734440111 is an apocalyptic number.

66734440111 is a deficient number, since it is larger than the sum of its proper divisors (1782004193).

66734440111 is a wasteful number, since it uses less digits than its factorization.

66734440111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674681.

The product of its (nonzero) digits is 48384, while the sum is 37.

Adding to 66734440111 its reverse (11104443766), we get a palindrome (77838883877).

It can be divided in two parts, 667344 and 40111, that added together give a triangular number (707455 = T₁₁₈₉).

The spelling of 66734440111 in words is "sixty-six billion, seven hundred thirty-four million, four hundred forty thousand, one hundred eleven".