66701039 has 4 divisors (see below), whose sum is σ = 70211640. Its totient is φ = 63190440.

The previous prime is 66701027. The next prime is 66701051. The reversal of 66701039 is 93010766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93010766 = 2 ⋅46505383.

It is an interprime number because it is at equal distance from previous prime (66701027) and next prime (66701051).

It is a cyclic number.

It is not a de Polignac number, because 66701039 - 2⁴ = 66701023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66700996 and 66701014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66701069) 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 in 3 ways as a sum of consecutive naturals, for example, 1755272 + ... + 1755309.

It is an arithmetic number, because the mean of its divisors is an integer number (17552910).

Almost surely, 2^66701039 is an apocalyptic number.

66701039 is a deficient number, since it is larger than the sum of its proper divisors (3510601).

66701039 is a wasteful number, since it uses less digits than its factorization.

66701039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3510600.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 66701039 is about 8167.0704049861. The cubic root of 66701039 is about 405.5498075567.

The spelling of 66701039 in words is "sixty-six million, seven hundred one thousand, thirty-nine".