66872635 has 8 divisors (see below), whose sum is σ = 80655696. Its totient is φ = 53225760.

The previous prime is 66872629. The next prime is 66872639. The reversal of 66872635 is 53627866.

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

It is not a de Polignac number, because 66872635 - 2⁹ = 66872123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66872591 and 66872600.

It is not an unprimeable number, because it can be changed into a prime (66872639) 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, 32961 + ... + 34930.

It is an arithmetic number, because the mean of its divisors is an integer number (10081962).

Almost surely, 2^66872635 is an apocalyptic number.

66872635 is a deficient number, since it is larger than the sum of its proper divisors (13783061).

66872635 is a wasteful number, since it uses less digits than its factorization.

66872635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68093.

The product of its digits is 362880, while the sum is 43.

The square root of 66872635 is about 8177.5690153003. The cubic root of 66872635 is about 405.8972840692.

The spelling of 66872635 in words is "sixty-six million, eight hundred seventy-two thousand, six hundred thirty-five".