66879506 has 8 divisors (see below), whose sum is σ = 105599280. Its totient is φ = 31679748.

The previous prime is 66879503. The next prime is 66879521. The reversal of 66879506 is 60597866.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66879503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879956 + ... + 880031.

It is an arithmetic number, because the mean of its divisors is an integer number (13199910).

Almost surely, 2^66879506 is an apocalyptic number.

66879506 is a deficient number, since it is larger than the sum of its proper divisors (38719774).

66879506 is a wasteful number, since it uses less digits than its factorization.

66879506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760008.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 66879506 is about 8177.9891171363. The cubic root of 66879506 is about 405.9111852448.

The spelling of 66879506 in words is "sixty-six million, eight hundred seventy-nine thousand, five hundred six".