102536661 has 4 divisors (see below), whose sum is σ = 136715552. Its totient is φ = 68357772.

The previous prime is 102536659. The next prime is 102536689. The reversal of 102536661 is 166635201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166635201 = 3 ⋅55545067.

It is not a de Polignac number, because 102536661 - 2¹ = 102536659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102536761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17089441 + ... + 17089446.

It is an arithmetic number, because the mean of its divisors is an integer number (34178888).

Almost surely, 2^102536661 is an apocalyptic number.

It is an amenable number.

102536661 is a deficient number, since it is larger than the sum of its proper divisors (34178891).

102536661 is an equidigital number, since it uses as much as digits as its factorization.

102536661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34178890.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 102536661 is about 10126.0387615296. The cubic root of 102536661 is about 468.0508701735.

The spelling of 102536661 in words is "one hundred two million, five hundred thirty-six thousand, six hundred sixty-one".