666740737067 has 4 divisors (see below), whose sum is σ = 669147743616. Its totient is φ = 664333730520.

The previous prime is 666740737027. The next prime is 666740737093. The reversal of 666740737067 is 760737047666.

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 666740737067 - 2³⁰ = 665666995243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666740736997 and 666740737015.

It is not an unprimeable number, because it can be changed into a prime (666740737027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1203502859 + ... + 1203503412.

It is an arithmetic number, because the mean of its divisors is an integer number (167286935904).

Almost surely, 2^666740737067 is an apocalyptic number.

666740737067 is a deficient number, since it is larger than the sum of its proper divisors (2407006549).

666740737067 is a wasteful number, since it uses less digits than its factorization.

666740737067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407006548.

The product of its (nonzero) digits is 37340352, while the sum is 59.

The spelling of 666740737067 in words is "six hundred sixty-six billion, seven hundred forty million, seven hundred thirty-seven thousand, sixty-seven".