66432743 has 4 divisors (see below), whose sum is σ = 71542968. Its totient is φ = 61322520.

The previous prime is 66432733. The next prime is 66432749. The reversal of 66432743 is 34723466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34723466 = 2 ⋅17361733.

It is a cyclic number.

It is not a de Polignac number, because 66432743 - 2²⁴ = 49655527 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 (66432749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2555093 + ... + 2555118.

It is an arithmetic number, because the mean of its divisors is an integer number (17885742).

Almost surely, 2^66432743 is an apocalyptic number.

66432743 is a deficient number, since it is larger than the sum of its proper divisors (5110225).

66432743 is a wasteful number, since it uses less digits than its factorization.

66432743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110224.

The product of its digits is 72576, while the sum is 35.

The square root of 66432743 is about 8150.6283806833. The cubic root of 66432743 is about 405.0053202573.

The spelling of 66432743 in words is "sixty-six million, four hundred thirty-two thousand, seven hundred forty-three".