3666425 has 36 divisors (see below), whose sum is σ = 5491836. Its totient is φ = 2419200.

The previous prime is 3666419. The next prime is 3666427. The reversal of 3666425 is 5246663.

It can be written as a sum of positive squares in 6 ways, for example, as 529984 + 3136441 = 728^2 + 1771^2 .

It is not a de Polignac number, because 3666425 - 2⁴ = 3666409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3666391 and 3666400.

It is not an unprimeable number, because it can be changed into a prime (3666427) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 50189 + ... + 50261.

It is an arithmetic number, because the mean of its divisors is an integer number (152551).

Almost surely, 2^3666425 is an apocalyptic number.

3666425 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3666425 is a deficient number, since it is larger than the sum of its proper divisors (1825411).

3666425 is a wasteful number, since it uses less digits than its factorization.

3666425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 126 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 3666425 is about 1914.7911113226. The cubic root of 3666425 is about 154.1987791234.

The spelling of 3666425 in words is "three million, six hundred sixty-six thousand, four hundred twenty-five".