66532312 has 32 divisors (see below), whose sum is σ = 155531520. Its totient is φ = 25921440.

The previous prime is 66532289. The next prime is 66532337. The reversal of 66532312 is 21323566.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 53388 + ... + 54619.

It is an arithmetic number, because the mean of its divisors is an integer number (4860360).

Almost surely, 2^66532312 is an apocalyptic number.

It is an amenable number.

66532312 is an abundant number, since it is smaller than the sum of its proper divisors (88999208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66532312 is a wasteful number, since it uses less digits than its factorization.

66532312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108031 (or 108027 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

The square root of 66532312 is about 8156.7341503815. The cubic root of 66532312 is about 405.2075591077.

Adding to 66532312 its reverse (21323566), we get a palindrome (87855878).

The spelling of 66532312 in words is "sixty-six million, five hundred thirty-two thousand, three hundred twelve".