66673510 has 16 divisors (see below), whose sum is σ = 120483936. Its totient is φ = 26564608.

The previous prime is 66673501. The next prime is 66673511. The reversal of 66673510 is 1537666.

It is a happy number.

It is a super-3 number, since 3×66673510³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66673511) 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 7 ways as a sum of consecutive naturals, for example, 10402 + ... + 15541.

It is an arithmetic number, because the mean of its divisors is an integer number (7530246).

Almost surely, 2^66673510 is an apocalyptic number.

66673510 is a deficient number, since it is larger than the sum of its proper divisors (53810426).

66673510 is a wasteful number, since it uses less digits than its factorization.

66673510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26207.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 66673510 is about 8165.3848653937. The cubic root of 66673510 is about 405.4940067421.

The spelling of 66673510 in words is "sixty-six million, six hundred seventy-three thousand, five hundred ten".