102666625 has 8 divisors (see below), whose sum is σ = 128128104. Its totient is φ = 82133200.

The previous prime is 102666623. The next prime is 102666653. The reversal of 102666625 is 526666201.

It can be written as a sum of positive squares in 4 ways, for example, as 21594609 + 81072016 = 4647^2 + 9004^2 .

It is not a de Polignac number, because 102666625 - 2¹ = 102666623 is a prime.

It is a super-4 number, since 4×102666625⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102666623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410542 + ... + 410791.

It is an arithmetic number, because the mean of its divisors is an integer number (16016013).

Almost surely, 2^102666625 is an apocalyptic number.

It is an amenable number.

102666625 is a deficient number, since it is larger than the sum of its proper divisors (25461479).

102666625 is an frugal number, since it uses more digits than its factorization.

102666625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821348 (or 821338 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 102666625 is about 10132.4540462812. The cubic root of 102666625 is about 468.2485363235.

The spelling of 102666625 in words is "one hundred two million, six hundred sixty-six thousand, six hundred twenty-five".