667774344407 has 16 divisors (see below), whose sum is σ = 685257484128. Its totient is φ = 650520668160.

The previous prime is 667774344389. The next prime is 667774344491. The reversal of 667774344407 is 704443477766.

It is a cyclic number.

It is not a de Polignac number, because 667774344407 - 2²⁶ = 667707235543 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 (667774341407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27332057 + ... + 27356477.

It is an arithmetic number, because the mean of its divisors is an integer number (42828592758).

Almost surely, 2^667774344407 is an apocalyptic number.

667774344407 is a deficient number, since it is larger than the sum of its proper divisors (17483139721).

667774344407 is a wasteful number, since it uses less digits than its factorization.

667774344407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29090.

The product of its (nonzero) digits is 66382848, while the sum is 59.

The spelling of 667774344407 in words is "six hundred sixty-seven billion, seven hundred seventy-four million, three hundred forty-four thousand, four hundred seven".