102555661 has 8 divisors (see below), whose sum is σ = 110676384. Its totient is φ = 94468080.

The previous prime is 102555659. The next prime is 102555683. The reversal of 102555661 is 166555201.

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

It is a cyclic number.

It is not a de Polignac number, because 102555661 - 2¹ = 102555659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102555631) 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 in 7 ways as a sum of consecutive naturals, for example, 1651 + ... + 14416.

It is an arithmetic number, because the mean of its divisors is an integer number (13834548).

Almost surely, 2^102555661 is an apocalyptic number.

It is an amenable number.

102555661 is a deficient number, since it is larger than the sum of its proper divisors (8120723).

102555661 is a wasteful number, since it uses less digits than its factorization.

102555661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16571.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 102555661 is about 10126.9768934268. The cubic root of 102555661 is about 468.0797782642.

The spelling of 102555661 in words is "one hundred two million, five hundred fifty-five thousand, six hundred sixty-one".