667883168551 has 4 divisors (see below), whose sum is σ = 667885896832. Its totient is φ = 667880440272.

The previous prime is 667883168543. The next prime is 667883168591. The reversal of 667883168551 is 155861388766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155861388766 = 2 ⋅77930694383.

It is a cyclic number.

It is not a de Polignac number, because 667883168551 - 2³ = 667883168543 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 (667883168591) 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, 956295 + ... + 1500088.

It is an arithmetic number, because the mean of its divisors is an integer number (166971474208).

Almost surely, 2^667883168551 is an apocalyptic number.

667883168551 is a deficient number, since it is larger than the sum of its proper divisors (2728281).

667883168551 is a wasteful number, since it uses less digits than its factorization.

667883168551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728280.

The product of its digits is 58060800, while the sum is 64.

The spelling of 667883168551 in words is "six hundred sixty-seven billion, eight hundred eighty-three million, one hundred sixty-eight thousand, five hundred fifty-one".