66066373 has 4 divisors (see below), whose sum is σ = 68938848. Its totient is φ = 63193900.

The previous prime is 66066359. The next prime is 66066383. The reversal of 66066373 is 37366066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37366066 = 2 ⋅18683033.

It is a cyclic number.

It is not a de Polignac number, because 66066373 - 2²¹ = 63969221 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 (66066353) 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, 1436203 + ... + 1436248.

It is an arithmetic number, because the mean of its divisors is an integer number (17234712).

Almost surely, 2^66066373 is an apocalyptic number.

It is an amenable number.

66066373 is a deficient number, since it is larger than the sum of its proper divisors (2872475).

66066373 is a wasteful number, since it uses less digits than its factorization.

66066373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872474.

The product of its (nonzero) digits is 81648, while the sum is 37.

The square root of 66066373 is about 8128.1223539019. The cubic root of 66066373 is about 404.2594259809.

The spelling of 66066373 in words is "sixty-six million, sixty-six thousand, three hundred seventy-three".