66752506 has 8 divisors (see below), whose sum is σ = 106018740. Its totient is φ = 31412928.

The previous prime is 66752503. The next prime is 66752527. The reversal of 66752506 is 60525766.

It can be written as a sum of positive squares in 2 ways, for example, as 65464281 + 1288225 = 8091^2 + 1135^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66752503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981621 + ... + 981688.

Almost surely, 2^66752506 is an apocalyptic number.

66752506 is a deficient number, since it is larger than the sum of its proper divisors (39266234).

66752506 is a wasteful number, since it uses less digits than its factorization.

66752506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963328.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 66752506 is about 8170.2206824541. The cubic root of 66752506 is about 405.6540891197.

The spelling of 66752506 in words is "sixty-six million, seven hundred fifty-two thousand, five hundred six".