66576733 has 2 divisors, whose sum is σ = 66576734. Its totient is φ = 66576732.

The previous prime is 66576677. The next prime is 66576739. The reversal of 66576733 is 33767566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60559524 + 6017209 = 7782^2 + 2453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66576733 is a prime.

It is a super-2 number, since 2×66576733² = 8864922753906578, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66576733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66576739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33288366 + 33288367.

It is an arithmetic number, because the mean of its divisors is an integer number (33288367).

Almost surely, 2^66576733 is an apocalyptic number.

It is an amenable number.

66576733 is a deficient number, since it is larger than the sum of its proper divisors (1).

66576733 is an equidigital number, since it uses as much as digits as its factorization.

66576733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 43.

The square root of 66576733 is about 8159.4566608323. The cubic root of 66576733 is about 405.2977194124.

The spelling of 66576733 in words is "sixty-six million, five hundred seventy-six thousand, seven hundred thirty-three".