70656671 has 4 divisors (see below), whose sum is σ = 71356344. Its totient is φ = 69957000.

The previous prime is 70656647. The next prime is 70656679. The reversal of 70656671 is 17665607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17665607 = 101 ⋅174907.

It is a cyclic number.

It is not a de Polignac number, because 70656671 - 2¹⁰ = 70655647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70656679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349685 + ... + 349886.

It is an arithmetic number, because the mean of its divisors is an integer number (17839086).

Almost surely, 2^70656671 is an apocalyptic number.

70656671 is a deficient number, since it is larger than the sum of its proper divisors (699673).

70656671 is a wasteful number, since it uses less digits than its factorization.

70656671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699672.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 70656671 is about 8405.7522566395. The cubic root of 70656671 is about 413.4132488703.

The spelling of 70656671 in words is "seventy million, six hundred fifty-six thousand, six hundred seventy-one".