201688667 has 8 divisors (see below), whose sum is σ = 213407760. Its totient is φ = 190080000.

The previous prime is 201688661. The next prime is 201688681. The reversal of 201688667 is 766886102.

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

It is a cyclic number.

It is not a de Polignac number, because 201688667 - 2⁶ = 201688603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201688661) 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, 23834 + ... + 31167.

It is an arithmetic number, because the mean of its divisors is an integer number (26675970).

Almost surely, 2^201688667 is an apocalyptic number.

201688667 is a deficient number, since it is larger than the sum of its proper divisors (11719093).

201688667 is a wasteful number, since it uses less digits than its factorization.

201688667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55213.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 201688667 is about 14201.7135233746. The cubic root of 201688667 is about 586.4448343828. Note that the first 3 decimals are identical.

The spelling of 201688667 in words is "two hundred one million, six hundred eighty-eight thousand, six hundred sixty-seven".