66970039 has 2 divisors, whose sum is σ = 66970040. Its totient is φ = 66970038.

The previous prime is 66969989. The next prime is 66970081. The reversal of 66970039 is 93007966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66970039 - 2⁷ = 66969911 is a prime.

It is a super-2 number, since 2×66970039² = 8969972247323042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66969983 and 66970010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66970439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33485019 + 33485020.

It is an arithmetic number, because the mean of its divisors is an integer number (33485020).

Almost surely, 2^66970039 is an apocalyptic number.

66970039 is a deficient number, since it is larger than the sum of its proper divisors (1).

66970039 is an equidigital number, since it uses as much as digits as its factorization.

66970039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 66970039 is about 8183.5224078633. The cubic root of 66970039 is about 406.0942597033.

The spelling of 66970039 in words is "sixty-six million, nine hundred seventy thousand, thirty-nine".