199351067666 has 16 divisors (see below), whose sum is σ = 305488177920. Its totient is φ = 97523054400.

The previous prime is 199351067651. The next prime is 199351067761. The reversal of 199351067666 is 666760153991.

It is a happy number.

It is a super-2 number, since 2×199351067666² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52910 + ... + 633641.

It is an arithmetic number, because the mean of its divisors is an integer number (19093011120).

Almost surely, 2^199351067666 is an apocalyptic number.

199351067666 is a deficient number, since it is larger than the sum of its proper divisors (106137110254).

199351067666 is a wasteful number, since it uses less digits than its factorization.

199351067666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689689.

The product of its (nonzero) digits is 11022480, while the sum is 59.

The spelling of 199351067666 in words is "one hundred ninety-nine billion, three hundred fifty-one million, sixty-seven thousand, six hundred sixty-six".