66072005 has 16 divisors (see below), whose sum is σ = 84672000. Its totient is φ = 49385280.

The previous prime is 66071977. The next prime is 66072007. The reversal of 66072005 is 50027066.

It is not a de Polignac number, because 66072005 - 2⁸ = 66071749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66072007) 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, 2855 + ... + 11844.

It is an arithmetic number, because the mean of its divisors is an integer number (5292000).

Almost surely, 2^66072005 is an apocalyptic number.

It is an amenable number.

66072005 is a deficient number, since it is larger than the sum of its proper divisors (18599995).

66072005 is a wasteful number, since it uses less digits than its factorization.

66072005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14764.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 66072005 is about 8128.4687979963. The cubic root of 66072005 is about 404.2709130370.

The spelling of 66072005 in words is "sixty-six million, seventy-two thousand, five".