66146479 has 4 divisors (see below), whose sum is σ = 75595984. Its totient is φ = 56696976.

The previous prime is 66146461. The next prime is 66146519. The reversal of 66146479 is 97464166.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66146479 - 2¹¹ = 66144431 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 (66146449) 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, 4724742 + ... + 4724755.

It is an arithmetic number, because the mean of its divisors is an integer number (18898996).

Almost surely, 2^66146479 is an apocalyptic number.

66146479 is a deficient number, since it is larger than the sum of its proper divisors (9449505).

66146479 is an equidigital number, since it uses as much as digits as its factorization.

66146479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9449504.

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

The square root of 66146479 is about 8133.0485674192. The cubic root of 66146479 is about 404.4227492393.

The spelling of 66146479 in words is "sixty-six million, one hundred forty-six thousand, four hundred seventy-nine".