66070971 has 12 divisors (see below), whose sum is σ = 98970872. Its totient is φ = 44047152.

The previous prime is 66070883. The next prime is 66070997. The reversal of 66070971 is 17907066.

It is not a de Polignac number, because 66070971 - 2¹⁰ = 66069947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66000971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135706 + ... + 136191.

Almost surely, 2^66070971 is an apocalyptic number.

66070971 is a deficient number, since it is larger than the sum of its proper divisors (32899901).

66070971 is an equidigital number, since it uses as much as digits as its factorization.

66070971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271912 (or 271900 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 66070971 is about 8128.4051941325. The cubic root of 66070971 is about 404.2688041342.

It can be divided in two parts, 660 and 70971, that added together give a triangular number (71631 = T₃₇₈).

The spelling of 66070971 in words is "sixty-six million, seventy thousand, nine hundred seventy-one".