66159425 has 24 divisors (see below), whose sum is σ = 89160960. Its totient is φ = 48513600.

The previous prime is 66159371. The next prime is 66159439. The reversal of 66159425 is 52495166.

It is not a de Polignac number, because 66159425 - 2⁶ = 66159361 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12479 + ... + 16971.

It is an arithmetic number, because the mean of its divisors is an integer number (3715040).

Almost surely, 2^66159425 is an apocalyptic number.

It is an amenable number.

66159425 is a deficient number, since it is larger than the sum of its proper divisors (23001535).

66159425 is a wasteful number, since it uses less digits than its factorization.

66159425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4553 (or 4548 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 66159425 is about 8133.8444170023. The cubic root of 66159425 is about 404.4491316735.

The spelling of 66159425 in words is "sixty-six million, one hundred fifty-nine thousand, four hundred twenty-five".