102666138 has 8 divisors (see below), whose sum is σ = 205332288. Its totient is φ = 34222044.

The previous prime is 102666133. The next prime is 102666143. The reversal of 102666138 is 831666201.

It is an interprime number because it is at equal distance from previous prime (102666133) and next prime (102666143).

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

102666138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 102666099 and 102666108.

It is not an unprimeable number, because it can be changed into a prime (102666131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8555506 + ... + 8555517.

It is an arithmetic number, because the mean of its divisors is an integer number (25666536).

Almost surely, 2^102666138 is an apocalyptic number.

102666138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

102666138 is a wasteful number, since it uses less digits than its factorization.

102666138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17111028.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 102666138 is about 10132.4300145622. The cubic root of 102666138 is about 468.2477959420.

The spelling of 102666138 in words is "one hundred two million, six hundred sixty-six thousand, one hundred thirty-eight".