30991799166 has 8 divisors (see below), whose sum is σ = 61983598344. Its totient is φ = 10330599720.

The previous prime is 30991799159. The next prime is 30991799173. The reversal of 30991799166 is 66199719903.

It is an interprime number because it is at equal distance from previous prime (30991799159) and next prime (30991799173).

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

30991799166 is an admirable number.

It is a congruent number.

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, 2582649925 + ... + 2582649936.

It is an arithmetic number, because the mean of its divisors is an integer number (7747949793).

Almost surely, 2^30991799166 is an apocalyptic number.

30991799166 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.

30991799166 is a wasteful number, since it uses less digits than its factorization.

30991799166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5165299866.

The product of its (nonzero) digits is 4960116, while the sum is 60.

The spelling of 30991799166 in words is "thirty billion, nine hundred ninety-one million, seven hundred ninety-nine thousand, one hundred sixty-six".