161332666 has 8 divisors (see below), whose sum is σ = 263998944. Its totient is φ = 73333020.

The previous prime is 161332651. The next prime is 161332681. The reversal of 161332666 is 666233161.

It is an interprime number because it is at equal distance from previous prime (161332651) and next prime (161332681).

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

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, 3666630 + ... + 3666673.

It is an arithmetic number, because the mean of its divisors is an integer number (32999868).

Almost surely, 2^161332666 is an apocalyptic number.

161332666 is a deficient number, since it is larger than the sum of its proper divisors (102666278).

161332666 is a wasteful number, since it uses less digits than its factorization.

161332666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7333316.

The product of its digits is 23328, while the sum is 34.

The square root of 161332666 is about 12701.6796527074. The cubic root of 161332666 is about 544.3866128802.

The spelling of 161332666 in words is "one hundred sixty-one million, three hundred thirty-two thousand, six hundred sixty-six".