66630473 has 32 divisors (see below), whose sum is σ = 87494400. Its totient is φ = 49268736.

The previous prime is 66630467. The next prime is 66630479. The reversal of 66630473 is 37403666.

It is an interprime number because it is at equal distance from previous prime (66630467) and next prime (66630479).

It is a cyclic number.

It is not a de Polignac number, because 66630473 - 2⁸ = 66630217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66630479) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153665 + ... + 154097.

It is an arithmetic number, because the mean of its divisors is an integer number (2734200).

Almost surely, 2^66630473 is an apocalyptic number.

It is an amenable number.

66630473 is a deficient number, since it is larger than the sum of its proper divisors (20863927).

66630473 is a wasteful number, since it uses less digits than its factorization.

66630473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561.

The product of its (nonzero) digits is 54432, while the sum is 35.

The square root of 66630473 is about 8162.7491079905. The cubic root of 66630473 is about 405.4067406911.

The spelling of 66630473 in words is "sixty-six million, six hundred thirty thousand, four hundred seventy-three".