102655566 has 64 divisors (see below), whose sum is σ = 247060800. Its totient is φ = 31408128.

The previous prime is 102655547. The next prime is 102655573. The reversal of 102655566 is 665556201.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 102655566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180130 + ... + 180698.

It is an arithmetic number, because the mean of its divisors is an integer number (3860325).

Almost surely, 2^102655566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102655566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123530400).

102655566 is an abundant number, since it is smaller than the sum of its proper divisors (144405234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102655566 is a wasteful number, since it uses less digits than its factorization.

102655566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 102655566 is about 10131.9083098891. The cubic root of 102655566 is about 468.2317228540.

The spelling of 102655566 in words is "one hundred two million, six hundred fifty-five thousand, five hundred sixty-six".