100664765 has 4 divisors (see below), whose sum is σ = 120797724. Its totient is φ = 80531808.

The previous prime is 100664731. The next prime is 100664783. The reversal of 100664765 is 567466001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 567466001 = 17 ⋅33380353.

It can be written as a sum of positive squares in 2 ways, for example, as 57486724 + 43178041 = 7582^2 + 6571^2 .

It is a cyclic number.

It is not a de Polignac number, because 100664765 - 2¹⁰ = 100663741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10066472 + ... + 10066481.

It is an arithmetic number, because the mean of its divisors is an integer number (30199431).

Almost surely, 2^100664765 is an apocalyptic number.

It is an amenable number.

100664765 is a deficient number, since it is larger than the sum of its proper divisors (20132959).

100664765 is an equidigital number, since it uses as much as digits as its factorization.

100664765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20132958.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 100664765 is about 10033.1831937825. The cubic root of 100664765 is about 465.1851345902.

The spelling of 100664765 in words is "one hundred million, six hundred sixty-four thousand, seven hundred sixty-five".