66825437 has 8 divisors (see below), whose sum is σ = 76423872. Its totient is φ = 57240000.

The previous prime is 66825433. The next prime is 66825443. The reversal of 66825437 is 73452866.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66825437 - 2² = 66825433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66825394 and 66825403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66825431) 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 7 ways as a sum of consecutive naturals, for example, 13637 + ... + 17877.

It is an arithmetic number, because the mean of its divisors is an integer number (9552984).

Almost surely, 2^66825437 is an apocalyptic number.

It is an amenable number.

66825437 is a deficient number, since it is larger than the sum of its proper divisors (9598435).

66825437 is a wasteful number, since it uses less digits than its factorization.

66825437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6499.

The product of its digits is 241920, while the sum is 41.

The square root of 66825437 is about 8174.6826849732. The cubic root of 66825437 is about 405.8017689214.

The spelling of 66825437 in words is "sixty-six million, eight hundred twenty-five thousand, four hundred thirty-seven".