66425847 has 4 divisors (see below), whose sum is σ = 88567800. Its totient is φ = 44283896.

The previous prime is 66425837. The next prime is 66425857. The reversal of 66425847 is 74852466.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (66425837) and next prime (66425857).

It is a cyclic number.

It is not a de Polignac number, because 66425847 - 2⁷ = 66425719 is a prime.

It is a super-3 number, since 3×66425847³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66425799 and 66425808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66425837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11070972 + ... + 11070977.

It is an arithmetic number, because the mean of its divisors is an integer number (22141950).

Almost surely, 2^66425847 is an apocalyptic number.

66425847 is a deficient number, since it is larger than the sum of its proper divisors (22141953).

66425847 is a wasteful number, since it uses less digits than its factorization.

66425847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22141952.

The product of its digits is 322560, while the sum is 42.

The square root of 66425847 is about 8150.2053348367. The cubic root of 66425847 is about 404.9913060167.

The spelling of 66425847 in words is "sixty-six million, four hundred twenty-five thousand, eight hundred forty-seven".