66676733 has 4 divisors (see below), whose sum is σ = 67364220. Its totient is φ = 65989248.

The previous prime is 66676699. The next prime is 66676759. The reversal of 66676733 is 33767666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18207289 + 48469444 = 4267^2 + 6962^2 .

It is a cyclic number.

It is not a de Polignac number, because 66676733 - 2¹⁰ = 66675709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66676933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343598 + ... + 343791.

It is an arithmetic number, because the mean of its divisors is an integer number (16841055).

Almost surely, 2^66676733 is an apocalyptic number.

It is an amenable number.

66676733 is a deficient number, since it is larger than the sum of its proper divisors (687487).

66676733 is an equidigital number, since it uses as much as digits as its factorization.

66676733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687486.

The product of its digits is 571536, while the sum is 44.

The square root of 66676733 is about 8165.5822205156. The cubic root of 66676733 is about 405.5005405020.

The spelling of 66676733 in words is "sixty-six million, six hundred seventy-six thousand, seven hundred thirty-three".