66651952 has 30 divisors (see below), whose sum is σ = 131709452. Its totient is φ = 32675136.

The previous prime is 66651941. The next prime is 66651961. The reversal of 66651952 is 25915666.

66651952 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44203 + ... + 45685.

Almost surely, 2^66651952 is an apocalyptic number.

It is an amenable number.

66651952 is a deficient number, since it is larger than the sum of its proper divisors (65057500).

66651952 is a wasteful number, since it uses less digits than its factorization.

66651952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597 (or 1538 counting only the distinct ones).

The product of its digits is 97200, while the sum is 40.

The square root of 66651952 is about 8164.0646739232. The cubic root of 66651952 is about 405.4502983181.

The spelling of 66651952 in words is "sixty-six million, six hundred fifty-one thousand, nine hundred fifty-two".