66427337 has 2 divisors, whose sum is σ = 66427338. Its totient is φ = 66427336.

The previous prime is 66427301. The next prime is 66427343. The reversal of 66427337 is 73372466.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38241856 + 28185481 = 6184^2 + 5309^2 .

It is a cyclic number.

It is not a de Polignac number, because 66427337 - 2²² = 62233033 is a prime.

It is a super-2 number, since 2×66427337² = 8825182201823138, 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 66427337.

It is not a weakly prime, because it can be changed into another prime (66427357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33213668 + 33213669.

It is an arithmetic number, because the mean of its divisors is an integer number (33213669).

Almost surely, 2^66427337 is an apocalyptic number.

It is an amenable number.

66427337 is a deficient number, since it is larger than the sum of its proper divisors (1).

66427337 is an equidigital number, since it uses as much as digits as its factorization.

66427337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 38.

The square root of 66427337 is about 8150.2967430640. The cubic root of 66427337 is about 404.9943341178.

The spelling of 66427337 in words is "sixty-six million, four hundred twenty-seven thousand, three hundred thirty-seven".