102565966 has 4 divisors (see below), whose sum is σ = 153848952. Its totient is φ = 51282982.

The previous prime is 102565963. The next prime is 102565973. The reversal of 102565966 is 669565201.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102565963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25641490 + ... + 25641493.

It is an arithmetic number, because the mean of its divisors is an integer number (38462238).

Almost surely, 2^102565966 is an apocalyptic number.

102565966 is a deficient number, since it is larger than the sum of its proper divisors (51282986).

102565966 is an equidigital number, since it uses as much as digits as its factorization.

102565966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51282985.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 102565966 is about 10127.4856701947. The cubic root of 102565966 is about 468.0954556064.

The spelling of 102565966 in words is "one hundred two million, five hundred sixty-five thousand, nine hundred sixty-six".