66524425 has 12 divisors (see below), whose sum is σ = 89989776. Its totient is φ = 48381200.

The previous prime is 66524413. The next prime is 66524431. The reversal of 66524425 is 52442566.

It is not a de Polignac number, because 66524425 - 2²³ = 58135817 is a prime.

It is a Duffinian number.

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, 120679 + ... + 121228.

It is an arithmetic number, because the mean of its divisors is an integer number (7499148).

Almost surely, 2^66524425 is an apocalyptic number.

It is an amenable number.

66524425 is a deficient number, since it is larger than the sum of its proper divisors (23465351).

66524425 is a wasteful number, since it uses less digits than its factorization.

66524425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241928 (or 241923 counting only the distinct ones).

The product of its digits is 57600, while the sum is 34.

The square root of 66524425 is about 8156.2506704981. The cubic root of 66524425 is about 405.1915468463.

The spelling of 66524425 in words is "sixty-six million, five hundred twenty-four thousand, four hundred twenty-five".