102660505 has 4 divisors (see below), whose sum is σ = 123192612. Its totient is φ = 82128400.

The previous prime is 102660487. The next prime is 102660511. The reversal of 102660505 is 505066201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505066201 = 181 ⋅2790421.

It can be written as a sum of positive squares in 2 ways, for example, as 49603849 + 53056656 = 7043^2 + 7284^2 .

It is not a de Polignac number, because 102660505 - 2¹³ = 102652313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102660505.

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, 10266046 + ... + 10266055.

It is an arithmetic number, because the mean of its divisors is an integer number (30798153).

Almost surely, 2^102660505 is an apocalyptic number.

It is an amenable number.

102660505 is a deficient number, since it is larger than the sum of its proper divisors (20532107).

102660505 is an equidigital number, since it uses as much as digits as its factorization.

102660505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20532106.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 102660505 is about 10132.1520418912. The cubic root of 102660505 is about 468.2392319756.

The spelling of 102660505 in words is "one hundred two million, six hundred sixty thousand, five hundred five".