100665157 has 4 divisors (see below), whose sum is σ = 100756396. Its totient is φ = 100573920.

The previous prime is 100665137. The next prime is 100665163. The reversal of 100665157 is 751566001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57289761 + 43375396 = 7569^2 + 6586^2 .

It is a cyclic number.

It is not a de Polignac number, because 100665157 - 2¹¹ = 100663109 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 (100665137) 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, 43944 + ... + 46177.

It is an arithmetic number, because the mean of its divisors is an integer number (25189099).

Almost surely, 2^100665157 is an apocalyptic number.

It is an amenable number.

100665157 is a deficient number, since it is larger than the sum of its proper divisors (91239).

100665157 is an equidigital number, since it uses as much as digits as its factorization.

100665157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91238.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 100665157 is about 10033.2027289395. The cubic root of 100665157 is about 465.1857384173.

The spelling of 100665157 in words is "one hundred million, six hundred sixty-five thousand, one hundred fifty-seven".