71066915 has 4 divisors (see below), whose sum is σ = 85280304. Its totient is φ = 56853528.

The previous prime is 71066909. The next prime is 71066959. The reversal of 71066915 is 51966017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51966017 = 1471 ⋅35327.

It is a cyclic number.

It is not a de Polignac number, because 71066915 - 2¹⁶ = 71001379 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7106687 + ... + 7106696.

It is an arithmetic number, because the mean of its divisors is an integer number (21320076).

Almost surely, 2^71066915 is an apocalyptic number.

71066915 is a deficient number, since it is larger than the sum of its proper divisors (14213389).

71066915 is a wasteful number, since it uses less digits than its factorization.

71066915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14213388.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 71066915 is about 8430.1195127946. The cubic root of 71066915 is about 414.2118199274.

The spelling of 71066915 in words is "seventy-one million, sixty-six thousand, nine hundred fifteen".