66684652 has 24 divisors (see below), whose sum is σ = 118540800. Its totient is φ = 32820480.

The previous prime is 66684649. The next prime is 66684707. The reversal of 66684652 is 25648666.

It is a super-2 number, since 2×66684652² = 8893685624722208, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66684599 and 66684608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75252 + ... + 76132.

It is an arithmetic number, because the mean of its divisors is an integer number (4939200).

Almost surely, 2^66684652 is an apocalyptic number.

It is an amenable number.

66684652 is a deficient number, since it is larger than the sum of its proper divisors (51856148).

66684652 is a wasteful number, since it uses less digits than its factorization.

66684652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161 (or 1159 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 66684652 is about 8166.0671072432. The cubic root of 66684652 is about 405.5165932364.

The spelling of 66684652 in words is "sixty-six million, six hundred eighty-four thousand, six hundred fifty-two".