102321666 has 12 divisors (see below), whose sum is σ = 221696982. Its totient is φ = 34107216.

The previous prime is 102321647. The next prime is 102321671. The reversal of 102321666 is 666123201.

It can be written as a sum of positive squares in only one way, i.e., 56475225 + 45846441 = 7515^2 + 6771^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2842251 + ... + 2842286.

Almost surely, 2^102321666 is an apocalyptic number.

102321666 is an abundant number, since it is smaller than the sum of its proper divisors (119375316).

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

102321666 is a wasteful number, since it uses less digits than its factorization.

102321666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5684545 (or 5684542 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 102321666 is about 10115.4172430009. The cubic root of 102321666 is about 467.7235108033.

Adding to 102321666 its reverse (666123201), we get a palindrome (768444867).

The spelling of 102321666 in words is "one hundred two million, three hundred twenty-one thousand, six hundred sixty-six".