100665671 has 4 divisors (see below), whose sum is σ = 101940000. Its totient is φ = 99391344.

The previous prime is 100665659. The next prime is 100665679. The reversal of 100665671 is 176566001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100665671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100665679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637046 + ... + 637203.

It is an arithmetic number, because the mean of its divisors is an integer number (25485000).

Almost surely, 2^100665671 is an apocalyptic number.

100665671 is a deficient number, since it is larger than the sum of its proper divisors (1274329).

100665671 is an equidigital number, since it uses as much as digits as its factorization.

100665671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274328.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 100665671 is about 10033.2283438582. The cubic root of 100665671 is about 465.1865301678.

The spelling of 100665671 in words is "one hundred million, six hundred sixty-five thousand, six hundred seventy-one".