667668871001 has 4 divisors (see below), whose sum is σ = 728366041104. Its totient is φ = 606971700900.

The previous prime is 667668870983. The next prime is 667668871019. The reversal of 667668871001 is 100178866766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (667668870983) and next prime (667668871019).

It is a cyclic number.

It is not a de Polignac number, because 667668871001 - 2¹⁰ = 667668869977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667668871091) 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, 30348585035 + ... + 30348585056.

It is an arithmetic number, because the mean of its divisors is an integer number (182091510276).

Almost surely, 2^667668871001 is an apocalyptic number.

It is an amenable number.

667668871001 is a deficient number, since it is larger than the sum of its proper divisors (60697170103).

667668871001 is a wasteful number, since it uses less digits than its factorization.

667668871001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60697170102.

The product of its (nonzero) digits is 4064256, while the sum is 56.

The spelling of 667668871001 in words is "six hundred sixty-seven billion, six hundred sixty-eight million, eight hundred seventy-one thousand, one".