66441025 has 12 divisors (see below), whose sum is σ = 94156672. Its totient is φ = 45559440.

The previous prime is 66441007. The next prime is 66441031. The reversal of 66441025 is 52014466.

It is not a de Polignac number, because 66441025 - 2⁵ = 66440993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66440984 and 66441002.

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, 189657 + ... + 190006.

Almost surely, 2^66441025 is an apocalyptic number.

It is an amenable number.

66441025 is a deficient number, since it is larger than the sum of its proper divisors (27715647).

66441025 is a wasteful number, since it uses less digits than its factorization.

66441025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379680 (or 379675 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 66441025 is about 8151.1364238369. The cubic root of 66441025 is about 405.0221498834.

The spelling of 66441025 in words is "sixty-six million, four hundred forty-one thousand, twenty-five".