66866474 has 32 divisors (see below), whose sum is σ = 113861376. Its totient is φ = 29272320.

The previous prime is 66866417. The next prime is 66866483. The reversal of 66866474 is 47466866.

It is a super-2 number, since 2×66866474² = 8942250690385352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27779 + ... + 30089.

It is an arithmetic number, because the mean of its divisors is an integer number (3558168).

Almost surely, 2^66866474 is an apocalyptic number.

66866474 is a deficient number, since it is larger than the sum of its proper divisors (46994902).

66866474 is a wasteful number, since it uses less digits than its factorization.

66866474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2390.

The product of its digits is 1161216, while the sum is 47.

The square root of 66866474 is about 8177.1923054310. The cubic root of 66866474 is about 405.8848185320.

The spelling of 66866474 in words is "sixty-six million, eight hundred sixty-six thousand, four hundred seventy-four".