66166462979 has 4 divisors (see below), whose sum is σ = 67705217976. Its totient is φ = 64627707984.

The previous prime is 66166462969. The next prime is 66166462981. The reversal of 66166462979 is 97926466166.

66166462979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 66166462979 - 2¹⁶ = 66166397443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66166462939) 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, 769377434 + ... + 769377519.

It is an arithmetic number, because the mean of its divisors is an integer number (16926304494).

Almost surely, 2^66166462979 is an apocalyptic number.

66166462979 is a deficient number, since it is larger than the sum of its proper divisors (1538754997).

66166462979 is a wasteful number, since it uses less digits than its factorization.

66166462979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538754996.

The product of its digits is 35271936, while the sum is 62.

The spelling of 66166462979 in words is "sixty-six billion, one hundred sixty-six million, four hundred sixty-two thousand, nine hundred seventy-nine".