667667663673 has 8 divisors (see below), whose sum is σ = 890267787936. Its totient is φ = 445089657600.

The previous prime is 667667663671. The next prime is 667667663699. The reversal of 667667663673 is 376366766766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667667663673 - 2¹ = 667667663671 is a prime.

It is a super-2 number, since 2×667667663673² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667667663598 and 667667663607.

It is not an unprimeable number, because it can be changed into a prime (667667663671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5458983 + ... + 5579948.

It is an arithmetic number, because the mean of its divisors is an integer number (111283473492).

Almost surely, 2^667667663673 is an apocalyptic number.

It is an amenable number.

667667663673 is a deficient number, since it is larger than the sum of its proper divisors (222600124263).

667667663673 is a wasteful number, since it uses less digits than its factorization.

667667663673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11059095.

The product of its digits is 864162432, while the sum is 69.

The spelling of 667667663673 in words is "six hundred sixty-seven billion, six hundred sixty-seven million, six hundred sixty-three thousand, six hundred seventy-three".