66436005 has 16 divisors (see below), whose sum is σ = 106418880. Its totient is φ = 35392128.

The previous prime is 66436001. The next prime is 66436009. The reversal of 66436005 is 50063466.

It is an interprime number because it is at equal distance from previous prime (66436001) and next prime (66436009).

It is not a de Polignac number, because 66436005 - 2² = 66436001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66436001) 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, 14974 + ... + 18896.

It is an arithmetic number, because the mean of its divisors is an integer number (6651180).

Almost surely, 2^66436005 is an apocalyptic number.

It is an amenable number.

66436005 is a deficient number, since it is larger than the sum of its proper divisors (39982875).

66436005 is a wasteful number, since it uses less digits than its factorization.

66436005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5060.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 66436005 is about 8150.8284854977. The cubic root of 66436005 is about 405.0119490454.

The spelling of 66436005 in words is "sixty-six million, four hundred thirty-six thousand, five".