66627471 has 32 divisors (see below), whose sum is σ = 102470400. Its totient is φ = 38223360.

The previous prime is 66627443. The next prime is 66627479. The reversal of 66627471 is 17472666.

66627471 = T₄₇₄ + T₄₇₅ + ... + T₇₉₆.

It is not a de Polignac number, because 66627471 - 2⁵ = 66627439 is a prime.

It is a super-3 number, since 3×66627471³ (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 (66627479) 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 31 ways as a sum of consecutive naturals, for example, 26916 + ... + 29286.

It is an arithmetic number, because the mean of its divisors is an integer number (3202200).

Almost surely, 2^66627471 is an apocalyptic number.

66627471 is a deficient number, since it is larger than the sum of its proper divisors (35842929).

66627471 is a wasteful number, since it uses less digits than its factorization.

66627471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439.

The product of its digits is 84672, while the sum is 39.

The square root of 66627471 is about 8162.5652217915. The cubic root of 66627471 is about 405.4006521390.

The spelling of 66627471 in words is "sixty-six million, six hundred twenty-seven thousand, four hundred seventy-one".