66752477 has 8 divisors (see below), whose sum is σ = 74789472. Its totient is φ = 59043600.

The previous prime is 66752471. The next prime is 66752503. The reversal of 66752477 is 77425766.

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

It is not a de Polignac number, because 66752477 - 2⁸ = 66752221 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 (66752471) 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 7 ways as a sum of consecutive naturals, for example, 81599 + ... + 82412.

It is an arithmetic number, because the mean of its divisors is an integer number (9348684).

Almost surely, 2^66752477 is an apocalyptic number.

It is an amenable number.

66752477 is a deficient number, since it is larger than the sum of its proper divisors (8036995).

66752477 is a wasteful number, since it uses less digits than its factorization.

66752477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164059.

The product of its digits is 493920, while the sum is 44.

The square root of 66752477 is about 8170.2189077160. The cubic root of 66752477 is about 405.6540303755.

Subtracting 66752477 from its reverse (77425766), we obtain a square (10673289 = 3267²).

The spelling of 66752477 in words is "sixty-six million, seven hundred fifty-two thousand, four hundred seventy-seven".