199764066 has 8 divisors (see below), whose sum is σ = 399528144. Its totient is φ = 66588020.

The previous prime is 199764023. The next prime is 199764067. The reversal of 199764066 is 660467991.

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

199764066 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (199764067) 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, 16647000 + ... + 16647011.

It is an arithmetic number, because the mean of its divisors is an integer number (49941018).

Almost surely, 2^199764066 is an apocalyptic number.

199764066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199764066 is a wasteful number, since it uses less digits than its factorization.

199764066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33294016.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 199764066 is about 14133.7916356511. The cubic root of 199764066 is about 584.5734987579.

It can be divided in two parts, 19976 and 4066, that added together give a palindrome (24042).

The spelling of 199764066 in words is "one hundred ninety-nine million, seven hundred sixty-four thousand, sixty-six".