66006739 has 2 divisors, whose sum is σ = 66006740. Its totient is φ = 66006738.

The previous prime is 66006727. The next prime is 66006769. The reversal of 66006739 is 93760066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66006739 - 2¹⁹ = 65482451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66006698 and 66006707.

It is not a weakly prime, because it can be changed into another prime (66006709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33003369 + 33003370.

It is an arithmetic number, because the mean of its divisors is an integer number (33003370).

Almost surely, 2^66006739 is an apocalyptic number.

66006739 is a deficient number, since it is larger than the sum of its proper divisors (1).

66006739 is an equidigital number, since it uses as much as digits as its factorization.

66006739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 66006739 is about 8124.4531508281. The cubic root of 66006739 is about 404.1377560974.

The spelling of 66006739 in words is "sixty-six million, six thousand, seven hundred thirty-nine".