100642665 has 8 divisors (see below), whose sum is σ = 161028288. Its totient is φ = 53676080.

The previous prime is 100642657. The next prime is 100642681. The reversal of 100642665 is 566246001.

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

It is not a de Polignac number, because 100642665 - 2³ = 100642657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3354741 + ... + 3354770.

It is an arithmetic number, because the mean of its divisors is an integer number (20128536).

Almost surely, 2^100642665 is an apocalyptic number.

100642665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100642665 is a deficient number, since it is larger than the sum of its proper divisors (60385623).

100642665 is an equidigital number, since it uses as much as digits as its factorization.

100642665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6709519.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 100642665 is about 10032.0817879441. The cubic root of 100642665 is about 465.1510897619.

Adding to 100642665 its reverse (566246001), we get a palindrome (666888666).

The spelling of 100642665 in words is "one hundred million, six hundred forty-two thousand, six hundred sixty-five".