66329871 has 8 divisors (see below), whose sum is σ = 90108720. Its totient is φ = 43385472.

The previous prime is 66329867. The next prime is 66329881. The reversal of 66329871 is 17892366.

It is a happy number.

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

It is not a de Polignac number, because 66329871 - 2² = 66329867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66329821) 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, 208426 + ... + 208743.

It is an arithmetic number, because the mean of its divisors is an integer number (11263590).

Almost surely, 2^66329871 is an apocalyptic number.

66329871 is a deficient number, since it is larger than the sum of its proper divisors (23778849).

66329871 is a wasteful number, since it uses less digits than its factorization.

66329871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417225.

The product of its digits is 108864, while the sum is 42.

The square root of 66329871 is about 8144.3152566683. The cubic root of 66329871 is about 404.7961601878.

The spelling of 66329871 in words is "sixty-six million, three hundred twenty-nine thousand, eight hundred seventy-one".