165887998 has 8 divisors (see below), whose sum is σ = 249045192. Its totient is φ = 82872936.

The previous prime is 165887977. The next prime is 165888011. The reversal of 165887998 is 899788561.

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

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, 32565 + ... + 37312.

It is an arithmetic number, because the mean of its divisors is an integer number (31130649).

Almost surely, 2^165887998 is an apocalyptic number.

165887998 is a deficient number, since it is larger than the sum of its proper divisors (83157194).

165887998 is a wasteful number, since it uses less digits than its factorization.

165887998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71066.

The product of its digits is 8709120, while the sum is 61.

The square root of 165887998 is about 12879.7514727575. The cubic root of 165887998 is about 549.4628342174.

The spelling of 165887998 in words is "one hundred sixty-five million, eight hundred eighty-seven thousand, nine hundred ninety-eight".