66476505 has 16 divisors (see below), whose sum is σ = 106709760. Its totient is φ = 35338368.

The previous prime is 66476491. The next prime is 66476507. The reversal of 66476505 is 50567466.

It is not a de Polignac number, because 66476505 - 2⁶ = 66476441 is a prime.

It is a super-3 number, since 3×66476505³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66476507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2385 + ... + 11774.

It is an arithmetic number, because the mean of its divisors is an integer number (6669360).

Almost surely, 2^66476505 is an apocalyptic number.

It is an amenable number.

66476505 is a deficient number, since it is larger than the sum of its proper divisors (40233255).

66476505 is a wasteful number, since it uses less digits than its factorization.

66476505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14480.

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 66476505 is about 8153.3125170080. The cubic root of 66476505 is about 405.0942319979.

The spelling of 66476505 in words is "sixty-six million, four hundred seventy-six thousand, five hundred five".