102666155540 has 96 divisors (see below), whose sum is σ = 254318914080. Its totient is φ = 34447343616.

The previous prime is 102666155521. The next prime is 102666155563. The reversal of 102666155540 is 45551666201.

It can be written as a sum of positive squares in 16 ways, for example, as 58896494596 + 43769660944 = 242686^2 + 209212^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272297 + ... + 528656.

It is an arithmetic number, because the mean of its divisors is an integer number (2649155355).

Almost surely, 2^102666155540 is an apocalyptic number.

102666155540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102666155540 is an abundant number, since it is smaller than the sum of its proper divisors (151652758540).

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

102666155540 is a wasteful number, since it uses less digits than its factorization.

102666155540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801021 (or 801019 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 102666155540 in words is "one hundred two billion, six hundred sixty-six million, one hundred fifty-five thousand, five hundred forty".