66043005 has 96 divisors (see below), whose sum is σ = 133781760. Its totient is φ = 27202560.

The previous prime is 66042953. The next prime is 66043009. The reversal of 66043005 is 50034066.

66043005 = 179² + 180² + ... + 588².

It is not a de Polignac number, because 66043005 - 2⁶ = 66042941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66043009) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1610785 + ... + 1610825.

It is an arithmetic number, because the mean of its divisors is an integer number (1393560).

Almost surely, 2^66043005 is an apocalyptic number.

It is an amenable number.

66043005 is an abundant number, since it is smaller than the sum of its proper divisors (67738755).

66043005 is a wasteful number, since it uses less digits than its factorization.

66043005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 66043005 is about 8126.6847484076. The cubic root of 66043005 is about 404.2117575134.

The spelling of 66043005 in words is "sixty-six million, forty-three thousand, five".