191966672 has 10 divisors (see below), whose sum is σ = 371935458. Its totient is φ = 95983328.

The previous prime is 191966657. The next prime is 191966699. The reversal of 191966672 is 276669191.

191966672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 165997456 + 25969216 = 12884^2 + 5096^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5998943 + ... + 5998974.

Almost surely, 2^191966672 is an apocalyptic number.

It is an amenable number.

191966672 is a deficient number, since it is larger than the sum of its proper divisors (179968786).

191966672 is a wasteful number, since it uses less digits than its factorization.

191966672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11997925 (or 11997919 counting only the distinct ones).

The product of its digits is 244944, while the sum is 47.

The square root of 191966672 is about 13855.2037877470. The cubic root of 191966672 is about 576.8664461263.

It can be divided in two parts, 19 and 1966672, that added together give a palindrome (1966691).

The spelling of 191966672 in words is "one hundred ninety-one million, nine hundred sixty-six thousand, six hundred seventy-two".