102066505 has 8 divisors (see below), whose sum is σ = 122718024. Its totient is φ = 81494400.

The previous prime is 102066491. The next prime is 102066529. The reversal of 102066505 is 505660201.

It can be written as a sum of positive squares in 4 ways, for example, as 17867529 + 84198976 = 4227^2 + 9176^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-102066505 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 102066505.

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, 16986 + ... + 22195.

It is an arithmetic number, because the mean of its divisors is an integer number (15339753).

Almost surely, 2^102066505 is an apocalyptic number.

It is an amenable number.

102066505 is a deficient number, since it is larger than the sum of its proper divisors (20651519).

102066505 is an equidigital number, since it uses as much as digits as its factorization.

102066505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39707.

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

The square root of 102066505 is about 10102.7968899706. The cubic root of 102066505 is about 467.3343975783.

The spelling of 102066505 in words is "one hundred two million, sixty-six thousand, five hundred five".