66102025 has 12 divisors (see below), whose sum is σ = 89418384. Its totient is φ = 48074000.

The previous prime is 66102019. The next prime is 66102041. The reversal of 66102025 is 52020166.

It is not a de Polignac number, because 66102025 - 2⁷ = 66101897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66101987 and 66102005.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119911 + ... + 120460.

It is an arithmetic number, because the mean of its divisors is an integer number (7451532).

Almost surely, 2^66102025 is an apocalyptic number.

It is an amenable number.

66102025 is a deficient number, since it is larger than the sum of its proper divisors (23316359).

66102025 is a wasteful number, since it uses less digits than its factorization.

66102025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240392 (or 240387 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 66102025 is about 8130.3151845424. The cubic root of 66102025 is about 404.3321309726.

The spelling of 66102025 in words is "sixty-six million, one hundred two thousand, twenty-five".