66368671 has 8 divisors (see below), whose sum is σ = 67767984. Its totient is φ = 64979520.

The previous prime is 66368641. The next prime is 66368693. The reversal of 66368671 is 17686366.

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 66368671 - 2¹³ = 66360479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66368641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11451 + ... + 16243.

It is an arithmetic number, because the mean of its divisors is an integer number (8470998).

Almost surely, 2^66368671 is an apocalyptic number.

66368671 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

66368671 is a deficient number, since it is larger than the sum of its proper divisors (1399313).

66368671 is a wasteful number, since it uses less digits than its factorization.

66368671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5081.

The product of its digits is 217728, while the sum is 43.

The square root of 66368671 is about 8146.6969380234. The cubic root of 66368671 is about 404.8750740030.

The spelling of 66368671 in words is "sixty-six million, three hundred sixty-eight thousand, six hundred seventy-one".