66079547 has 4 divisors (see below), whose sum is σ = 66721200. Its totient is φ = 65437896.

The previous prime is 66079543. The next prime is 66079579. The reversal of 66079547 is 74597066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74597066 = 2 ⋅37298533.

It is a cyclic number.

It is not a de Polignac number, because 66079547 - 2² = 66079543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66079498 and 66079507.

It is not an unprimeable number, because it can be changed into a prime (66079543) 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, 320672 + ... + 320877.

It is an arithmetic number, because the mean of its divisors is an integer number (16680300).

Almost surely, 2^66079547 is an apocalyptic number.

66079547 is a deficient number, since it is larger than the sum of its proper divisors (641653).

66079547 is a wasteful number, since it uses less digits than its factorization.

66079547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641652.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 66079547 is about 8128.9327097719. The cubic root of 66079547 is about 404.2862947165.

The spelling of 66079547 in words is "sixty-six million, seventy-nine thousand, five hundred forty-seven".