66328743 has 16 divisors (see below), whose sum is σ = 95650016. Its totient is φ = 40642560.

The previous prime is 66328733. The next prime is 66328783. The reversal of 66328743 is 34782366.

It is not a de Polignac number, because 66328743 - 2¹⁷ = 66197671 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66328723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5871 + ... + 12927.

It is an arithmetic number, because the mean of its divisors is an integer number (5978126).

Almost surely, 2^66328743 is an apocalyptic number.

66328743 is a deficient number, since it is larger than the sum of its proper divisors (29321273).

66328743 is a wasteful number, since it uses less digits than its factorization.

66328743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314.

The product of its digits is 145152, while the sum is 39.

The square root of 66328743 is about 8144.2460056165. The cubic root of 66328743 is about 404.7938655321.

The spelling of 66328743 in words is "sixty-six million, three hundred twenty-eight thousand, seven hundred forty-three".