201668866867 has 4 divisors (see below), whose sum is σ = 217181856640. Its totient is φ = 186155877096.

The previous prime is 201668866843. The next prime is 201668866877. The reversal of 201668866867 is 768668866102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201668866867 - 2³⁵ = 167309128499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201668866799 and 201668866808.

It is not an unprimeable number, because it can be changed into a prime (201668866807) 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, 7756494867 + ... + 7756494892.

It is an arithmetic number, because the mean of its divisors is an integer number (54295464160).

Almost surely, 2^201668866867 is an apocalyptic number.

201668866867 is a deficient number, since it is larger than the sum of its proper divisors (15512989773).

201668866867 is a wasteful number, since it uses less digits than its factorization.

201668866867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15512989772.

The product of its (nonzero) digits is 55738368, while the sum is 64.

The spelling of 201668866867 in words is "two hundred one billion, six hundred sixty-eight million, eight hundred sixty-six thousand, eight hundred sixty-seven".