66117425 has 24 divisors (see below), whose sum is σ = 90223392. Its totient is φ = 48061200.

The previous prime is 66117413. The next prime is 66117427. The reversal of 66117425 is 52471166.

It is not a de Polignac number, because 66117425 - 2¹² = 66113329 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66117391 and 66117400.

It is not an unprimeable number, because it can be changed into a prime (66117427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32282 + ... + 34268.

It is an arithmetic number, because the mean of its divisors is an integer number (3759308).

Almost surely, 2^66117425 is an apocalyptic number.

It is an amenable number.

66117425 is a deficient number, since it is larger than the sum of its proper divisors (24105967).

66117425 is a wasteful number, since it uses less digits than its factorization.

66117425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030 (or 2003 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 66117425 is about 8131.2622021430. The cubic root of 66117425 is about 404.3635280507.

The spelling of 66117425 in words is "sixty-six million, one hundred seventeen thousand, four hundred twenty-five".