1995198866 has 8 divisors (see below), whose sum is σ = 2993193840. Its totient is φ = 997467588.

The previous prime is 1995198857. The next prime is 1995198899. The reversal of 1995198866 is 6688915991.

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

It is a junction number, because it is equal to n+sod(n) for n = 1995198799 and 1995198808.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45776 + ... + 78011.

It is an arithmetic number, because the mean of its divisors is an integer number (374149230).

Almost surely, 2^1995198866 is an apocalyptic number.

1995198866 is a deficient number, since it is larger than the sum of its proper divisors (997994974).

1995198866 is a wasteful number, since it uses less digits than its factorization.

1995198866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131848.

The product of its digits is 8398080, while the sum is 62.

The square root of 1995198866 is about 44667.6489867107. The cubic root of 1995198866 is about 1258.9120671217.

The spelling of 1995198866 in words is "one billion, nine hundred ninety-five million, one hundred ninety-eight thousand, eight hundred sixty-six".