66296409 has 8 divisors (see below), whose sum is σ = 88889760. Its totient is φ = 43950336.

The previous prime is 66296387. The next prime is 66296423. The reversal of 66296409 is 90469266.

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

It is not a de Polignac number, because 66296409 - 2¹² = 66292313 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66296479) 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, 61192 + ... + 62265.

It is an arithmetic number, because the mean of its divisors is an integer number (11111220).

Almost surely, 2^66296409 is an apocalyptic number.

It is an amenable number.

66296409 is a deficient number, since it is larger than the sum of its proper divisors (22593351).

66296409 is a wasteful number, since it uses less digits than its factorization.

66296409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123639.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 66296409 is about 8142.2606811622. The cubic root of 66296409 is about 404.7280784054.

The spelling of 66296409 in words is "sixty-six million, two hundred ninety-six thousand, four hundred nine".