667185145607 has 4 divisors (see below), whose sum is σ = 696193195440. Its totient is φ = 638177095776.

The previous prime is 667185145579. The next prime is 667185145691. The reversal of 667185145607 is 706541581766.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 706541581766 = 2 ⋅353270790883.

It is a cyclic number.

It is not a de Polignac number, because 667185145607 - 2²⁰ = 667184097031 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 (667185145007) 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, 14504024882 + ... + 14504024927.

It is an arithmetic number, because the mean of its divisors is an integer number (174048298860).

Almost surely, 2^667185145607 is an apocalyptic number.

667185145607 is a deficient number, since it is larger than the sum of its proper divisors (29008049833).

667185145607 is a wasteful number, since it uses less digits than its factorization.

667185145607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29008049832.

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 667185145607 in words is "six hundred sixty-seven billion, one hundred eighty-five million, one hundred forty-five thousand, six hundred seven".