66896438 has 16 divisors (see below), whose sum is σ = 115864224. Its totient is φ = 28373760.

The previous prime is 66896429. The next prime is 66896471. The reversal of 66896438 is 83469866.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23273 + ... + 25988.

It is an arithmetic number, because the mean of its divisors is an integer number (7241514).

Almost surely, 2^66896438 is an apocalyptic number.

66896438 is a deficient number, since it is larger than the sum of its proper divisors (48967786).

66896438 is a wasteful number, since it uses less digits than its factorization.

66896438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49367.

The product of its digits is 1492992, while the sum is 50.

The square root of 66896438 is about 8179.0242694346. The cubic root of 66896438 is about 405.9454374329.

The spelling of 66896438 in words is "sixty-six million, eight hundred ninety-six thousand, four hundred thirty-eight".