66632475 has 72 divisors (see below), whose sum is σ = 136515072. Its totient is φ = 28080000.

The previous prime is 66632441. The next prime is 66632477. The reversal of 66632475 is 57423666.

It is not a de Polignac number, because 66632475 - 2⁹ = 66631963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66632477) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 88350 + ... + 89100.

Almost surely, 2^66632475 is an apocalyptic number.

66632475 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66632475 is an abundant number, since it is smaller than the sum of its proper divisors (69882597).

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

66632475 is a wasteful number, since it uses less digits than its factorization.

66632475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 779 counting only the distinct ones).

The product of its digits is 181440, while the sum is 39.

The square root of 66632475 is about 8162.8717373238. The cubic root of 66632475 is about 405.4108009762.

The spelling of 66632475 in words is "sixty-six million, six hundred thirty-two thousand, four hundred seventy-five".