66775173 has 8 divisors (see below), whose sum is σ = 91104288. Its totient is φ = 43481424.

The previous prime is 66775153. The next prime is 66775193. The reversal of 66775173 is 37157766.

It is an interprime number because it is at equal distance from previous prime (66775153) and next prime (66775193).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66775173 - 2⁹ = 66774661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66775103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258690 + ... + 258947.

It is an arithmetic number, because the mean of its divisors is an integer number (11388036).

Almost surely, 2^66775173 is an apocalyptic number.

It is an amenable number.

66775173 is a deficient number, since it is larger than the sum of its proper divisors (24329115).

66775173 is a wasteful number, since it uses less digits than its factorization.

66775173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517683.

The product of its digits is 185220, while the sum is 42.

The square root of 66775173 is about 8171.6077365473. The cubic root of 66775173 is about 405.6999996091.

The spelling of 66775173 in words is "sixty-six million, seven hundred seventy-five thousand, one hundred seventy-three".