66779833 has 8 divisors (see below), whose sum is σ = 69789888. Its totient is φ = 63778704.

The previous prime is 66779827. The next prime is 66779861. The reversal of 66779833 is 33897766.

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 66779833 - 2¹³ = 66771641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66779873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16510 + ... + 20152.

It is an arithmetic number, because the mean of its divisors is an integer number (8723736).

Almost surely, 2^66779833 is an apocalyptic number.

It is an amenable number.

66779833 is a deficient number, since it is larger than the sum of its proper divisors (3010055).

66779833 is a wasteful number, since it uses less digits than its factorization.

66779833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4463.

The product of its digits is 1143072, while the sum is 49.

The square root of 66779833 is about 8171.8928651812. The cubic root of 66779833 is about 405.7094368393.

The spelling of 66779833 in words is "sixty-six million, seven hundred seventy-nine thousand, eight hundred thirty-three".