66772337 has 2 divisors, whose sum is σ = 66772338. Its totient is φ = 66772336.

The previous prime is 66772333. The next prime is 66772367. The reversal of 66772337 is 73327766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44408896 + 22363441 = 6664^2 + 4729^2 .

It is a cyclic number.

It is not a de Polignac number, because 66772337 - 2² = 66772333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66772294 and 66772303.

It is not a weakly prime, because it can be changed into another prime (66772331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33386168 + 33386169.

It is an arithmetic number, because the mean of its divisors is an integer number (33386169).

Almost surely, 2^66772337 is an apocalyptic number.

It is an amenable number.

66772337 is a deficient number, since it is larger than the sum of its proper divisors (1).

66772337 is an equidigital number, since it uses as much as digits as its factorization.

66772337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 41.

The square root of 66772337 is about 8171.4342070410. The cubic root of 66772337 is about 405.6942560499.

The spelling of 66772337 in words is "sixty-six million, seven hundred seventy-two thousand, three hundred thirty-seven".