66887733 has 32 divisors (see below), whose sum is σ = 103472640. Its totient is φ = 38007360.

The previous prime is 66887729. The next prime is 66887761. The reversal of 66887733 is 33778866.

It is not a de Polignac number, because 66887733 - 2² = 66887729 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66887713) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66591 + ... + 67587.

It is an arithmetic number, because the mean of its divisors is an integer number (3233520).

Almost surely, 2^66887733 is an apocalyptic number.

It is an amenable number.

66887733 is a deficient number, since it is larger than the sum of its proper divisors (36584907).

66887733 is a wasteful number, since it uses less digits than its factorization.

66887733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137.

The product of its digits is 1016064, while the sum is 48.

The square root of 66887733 is about 8178.4920981804. The cubic root of 66887733 is about 405.9278285815.

The spelling of 66887733 in words is "sixty-six million, eight hundred eighty-seven thousand, seven hundred thirty-three".