66214025 has 12 divisors (see below), whose sum is σ = 82351500. Its totient is φ = 52812480.

The previous prime is 66214021. The next prime is 66214063. The reversal of 66214025 is 52041266.

66214025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 8042896 + 58171129 = 2836^2 + 7627^2 .

It is not a de Polignac number, because 66214025 - 2² = 66214021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66213985 and 66214003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66214021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4931 + ... + 12519.

It is an arithmetic number, because the mean of its divisors is an integer number (6862625).

Almost surely, 2^66214025 is an apocalyptic number.

It is an amenable number.

66214025 is a deficient number, since it is larger than the sum of its proper divisors (16137475).

66214025 is a wasteful number, since it uses less digits than its factorization.

66214025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7948 (or 7943 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 66214025 is about 8137.2000712776. The cubic root of 66214025 is about 404.5603622377.

The spelling of 66214025 in words is "sixty-six million, two hundred fourteen thousand, twenty-five".