101665998 has 48 divisors (see below), whose sum is σ = 265000320. Its totient is φ = 27517968.

The previous prime is 101665997. The next prime is 101666011. The reversal of 101665998 is 899566101.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101665997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18840 + ... + 23627.

It is an arithmetic number, because the mean of its divisors is an integer number (5520840).

Almost surely, 2^101665998 is an apocalyptic number.

101665998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

101665998 is an abundant number, since it is smaller than the sum of its proper divisors (163334322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101665998 is a wasteful number, since it uses less digits than its factorization.

101665998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42501 (or 42498 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 101665998 is about 10082.9558166244. The cubic root of 101665998 is about 466.7223259010.

The spelling of 101665998 in words is "one hundred one million, six hundred sixty-five thousand, nine hundred ninety-eight".