66000025 has 48 divisors (see below), whose sum is σ = 102465664. Its totient is φ = 41057280.

The previous prime is 66000013. The next prime is 66000029. The reversal of 66000025 is 52000066.

It is not a de Polignac number, because 66000025 - 2⁵ = 65999993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65999966 and 66000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66000029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 152209 + ... + 152641.

Almost surely, 2^66000025 is an apocalyptic number.

66000025 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66000025 is a deficient number, since it is larger than the sum of its proper divisors (36465639).

66000025 is a wasteful number, since it uses less digits than its factorization.

66000025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 66000025 is about 8124.0399432795. The cubic root of 66000025 is about 404.1240530880.

The spelling of 66000025 in words is "sixty-six million, twenty-five", and thus it is an aban number and an uban number.