66558952 has 8 divisors (see below), whose sum is σ = 124798050. Its totient is φ = 33279472.

The previous prime is 66558929. The next prime is 66558979. The reversal of 66558952 is 25985566.

It can be written as a sum of positive squares in only one way, i.e., 66031876 + 527076 = 8126^2 + 726^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4159927 + ... + 4159942.

Almost surely, 2^66558952 is an apocalyptic number.

It is an amenable number.

66558952 is a deficient number, since it is larger than the sum of its proper divisors (58239098).

66558952 is a wasteful number, since it uses less digits than its factorization.

66558952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8319875 (or 8319871 counting only the distinct ones).

The product of its digits is 648000, while the sum is 46.

The square root of 66558952 is about 8158.3669934614. The cubic root of 66558952 is about 405.2616345316.

The spelling of 66558952 in words is "sixty-six million, five hundred fifty-eight thousand, nine hundred fifty-two".