66105425 has 12 divisors (see below), whose sum is σ = 82113420. Its totient is φ = 52792320.

The previous prime is 66105419. The next prime is 66105437. The reversal of 66105425 is 52450166.

It can be written as a sum of positive squares in 6 ways, for example, as 11478544 + 54626881 = 3388^2 + 7391^2 .

It is a de Polignac number, because none of the positive numbers 2^k-66105425 is a prime.

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, 14861 + ... + 18789.

It is an arithmetic number, because the mean of its divisors is an integer number (6842785).

Almost surely, 2^66105425 is an apocalyptic number.

It is an amenable number.

66105425 is a deficient number, since it is larger than the sum of its proper divisors (16007995).

66105425 is a wasteful number, since it uses less digits than its factorization.

66105425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4612 (or 4607 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 66105425 is about 8130.5242758386. The cubic root of 66105425 is about 404.3390632144.

The spelling of 66105425 in words is "sixty-six million, one hundred five thousand, four hundred twenty-five".