102720660 has 72 divisors (see below), whose sum is σ = 334585440. Its totient is φ = 23478336.

The previous prime is 102720659. The next prime is 102720671. The reversal of 102720660 is 66027201.

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 102720660.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14530 + ... + 20409.

It is an arithmetic number, because the mean of its divisors is an integer number (4647020).

Almost surely, 2^102720660 is an apocalyptic number.

102720660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102720660 is an abundant number, since it is smaller than the sum of its proper divisors (231864780).

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

102720660 is a wasteful number, since it uses less digits than its factorization.

102720660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34965 (or 34956 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 102720660 is about 10135.1201275565. The cubic root of 102720660 is about 468.3306706816.

Adding to 102720660 its reverse (66027201), we get a palindrome (168747861).

The spelling of 102720660 in words is "one hundred two million, seven hundred twenty thousand, six hundred sixty".