66752757 has 12 divisors (see below), whose sum is σ = 101495680. Its totient is φ = 42159528.

The previous prime is 66752747. The next prime is 66752779. The reversal of 66752757 is 75725766.

It is not a de Polignac number, because 66752757 - 2¹⁰ = 66751733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66752747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195013 + ... + 195354.

Almost surely, 2^66752757 is an apocalyptic number.

It is an amenable number.

66752757 is a deficient number, since it is larger than the sum of its proper divisors (34742923).

66752757 is a wasteful number, since it uses less digits than its factorization.

66752757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390392 (or 390389 counting only the distinct ones).

The product of its digits is 617400, while the sum is 45.

The square root of 66752757 is about 8170.2360431018. The cubic root of 66752757 is about 405.6545975603.

The spelling of 66752757 in words is "sixty-six million, seven hundred fifty-two thousand, seven hundred fifty-seven".