994991666905 has 8 divisors (see below), whose sum is σ = 1200241257984. Its totient is φ = 791825828400.

The previous prime is 994991666899. The next prime is 994991666923. The reversal of 994991666905 is 509666199499.

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

It is not a de Polignac number, because 994991666905 - 2³ = 994991666897 is a prime.

It is a Duffinian 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, 520937091 + ... + 520939000.

It is an arithmetic number, because the mean of its divisors is an integer number (150030157248).

Almost surely, 2^994991666905 is an apocalyptic number.

It is an amenable number.

994991666905 is a deficient number, since it is larger than the sum of its proper divisors (205249591079).

994991666905 is a wasteful number, since it uses less digits than its factorization.

994991666905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041876287.

The product of its (nonzero) digits is 255091680, while the sum is 73.

The spelling of 994991666905 in words is "nine hundred ninety-four billion, nine hundred ninety-one million, six hundred sixty-six thousand, nine hundred five".