66566429 has 8 divisors (see below), whose sum is σ = 68407680. Its totient is φ = 64742976.

The previous prime is 66566419. The next prime is 66566447. The reversal of 66566429 is 92466566.

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 66566429 - 2⁴ = 66566413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66566429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66566419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3317 + ... + 12005.

It is an arithmetic number, because the mean of its divisors is an integer number (8550960).

Almost surely, 2^66566429 is an apocalyptic number.

It is an amenable number.

66566429 is a deficient number, since it is larger than the sum of its proper divisors (1841251).

66566429 is a wasteful number, since it uses less digits than its factorization.

66566429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8899.

The product of its digits is 466560, while the sum is 44.

The square root of 66566429 is about 8158.8252218074. The cubic root of 66566429 is about 405.2768091885.

The spelling of 66566429 in words is "sixty-six million, five hundred sixty-six thousand, four hundred twenty-nine".