66729467 has 8 divisors (see below), whose sum is σ = 76768512. Its totient is φ = 56817000.

The previous prime is 66729433. The next prime is 66729469. The reversal of 66729467 is 76492766.

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 66729467 - 2⁸ = 66729211 is a prime.

It is a super-2 number, since 2×66729467² = 8905643532208178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66729469) 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, 30509 + ... + 32622.

It is an arithmetic number, because the mean of its divisors is an integer number (9596064).

Almost surely, 2^66729467 is an apocalyptic number.

66729467 is a deficient number, since it is larger than the sum of its proper divisors (10039045).

66729467 is a wasteful number, since it uses less digits than its factorization.

66729467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63289.

The product of its digits is 762048, while the sum is 47.

The square root of 66729467 is about 8168.8106233405. The cubic root of 66729467 is about 405.6074145176.

The spelling of 66729467 in words is "sixty-six million, seven hundred twenty-nine thousand, four hundred sixty-seven".