165016666 has 8 divisors (see below), whose sum is σ = 252195444. Its totient is φ = 80951520.

The previous prime is 165016619. The next prime is 165016673. The reversal of 165016666 is 666610561.

It can be written as a sum of positive squares in 2 ways, for example, as 163098441 + 1918225 = 12771^2 + 1385^2 .

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, 778275 + ... + 778486.

Almost surely, 2^165016666 is an apocalyptic number.

165016666 is a deficient number, since it is larger than the sum of its proper divisors (87178778).

165016666 is a wasteful number, since it uses less digits than its factorization.

165016666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556816.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 165016666 is about 12845.8812854549. The cubic root of 165016666 is about 548.4991212450.

The spelling of 165016666 in words is "one hundred sixty-five million, sixteen thousand, six hundred sixty-six".