66734440001 has 4 divisors (see below), whose sum is σ = 68887163904. Its totient is φ = 64581716100.

The previous prime is 66734439983. The next prime is 66734440009. The reversal of 66734440001 is 10004443766.

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 a de Polignac number, because none of the positive numbers 2^k-66734440001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66734440009) 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, 1076361905 + ... + 1076361966.

It is an arithmetic number, because the mean of its divisors is an integer number (17221790976).

Almost surely, 2^66734440001 is an apocalyptic number.

It is an amenable number.

66734440001 is a deficient number, since it is larger than the sum of its proper divisors (2152723903).

66734440001 is a wasteful number, since it uses less digits than its factorization.

66734440001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152723902.

The product of its (nonzero) digits is 48384, while the sum is 35.

Adding to 66734440001 its reverse (10004443766), we get a palindrome (76738883767).

The spelling of 66734440001 in words is "sixty-six billion, seven hundred thirty-four million, four hundred forty thousand, one".