66750752 has 24 divisors (see below), whose sum is σ = 132003900. Its totient is φ = 33225984.

The previous prime is 66750751. The next prime is 66750757. The reversal of 66750752 is 25705766.

It can be written as a sum of positive squares in 2 ways, for example, as 66650896 + 99856 = 8164^2 + 316^2 .

It is not an unprimeable number, because it can be changed into a prime (66750751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2774 + ... + 11882.

Almost surely, 2^66750752 is an apocalyptic number.

It is an amenable number.

66750752 is a deficient number, since it is larger than the sum of its proper divisors (65253148).

66750752 is a wasteful number, since it uses less digits than its factorization.

66750752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9348 (or 9340 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 66750752 is about 8170.1133407071. The cubic root of 66750752 is about 405.6505360770.

The spelling of 66750752 in words is "sixty-six million, seven hundred fifty thousand, seven hundred fifty-two".