66679329 has 8 divisors (see below), whose sum is σ = 89191072. Its totient is φ = 44310240.

The previous prime is 66679307. The next prime is 66679339. The reversal of 66679329 is 92397666.

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

It is not a de Polignac number, because 66679329 - 2⁷ = 66679201 is a prime.

It is a super-2 number, since 2×66679329² = 8892265831780482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66679339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34567 + ... + 36444.

It is an arithmetic number, because the mean of its divisors is an integer number (11148884).

Almost surely, 2^66679329 is an apocalyptic number.

It is an amenable number.

66679329 is a deficient number, since it is larger than the sum of its proper divisors (22511743).

66679329 is a wasteful number, since it uses less digits than its factorization.

66679329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71327.

The product of its digits is 734832, while the sum is 48.

The square root of 66679329 is about 8165.7411788520. The cubic root of 66679329 is about 405.5058030361.

The spelling of 66679329 in words is "sixty-six million, six hundred seventy-nine thousand, three hundred twenty-nine".