165020998 has 24 divisors (see below), whose sum is σ = 266966064. Its totient is φ = 76356720.

The previous prime is 165020993. The next prime is 165021001. The reversal of 165020998 is 899020561.

It is a self number, because there is not a number n which added to its sum of digits gives 165020998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165020993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42340 + ... + 46072.

It is an arithmetic number, because the mean of its divisors is an integer number (11123586).

Almost surely, 2^165020998 is an apocalyptic number.

165020998 is a deficient number, since it is larger than the sum of its proper divisors (101945066).

165020998 is a wasteful number, since it uses less digits than its factorization.

165020998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820 (or 3789 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 165020998 is about 12846.0498987043. The cubic root of 165020998 is about 548.5039209166.

The spelling of 165020998 in words is "one hundred sixty-five million, twenty thousand, nine hundred ninety-eight".