66047107 has 4 divisors (see below), whose sum is σ = 75482416. Its totient is φ = 56611800.

The previous prime is 66047087. The next prime is 66047117. The reversal of 66047107 is 70174066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70174066 = 2 ⋅35087033.

It is not a de Polignac number, because 66047107 - 2⁷ = 66046979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66047117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4717644 + ... + 4717657.

It is an arithmetic number, because the mean of its divisors is an integer number (18870604).

Almost surely, 2^66047107 is an apocalyptic number.

66047107 is a deficient number, since it is larger than the sum of its proper divisors (9435309).

66047107 is an equidigital number, since it uses as much as digits as its factorization.

66047107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9435308.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 66047107 is about 8126.9371229264. The cubic root of 66047107 is about 404.2201260116.

The spelling of 66047107 in words is "sixty-six million, forty-seven thousand, one hundred seven".