70013665 has 8 divisors (see below), whose sum is σ = 85394088. Its totient is φ = 55092480.

The previous prime is 70013653. The next prime is 70013677. The reversal of 70013665 is 56631007.

It is an interprime number because it is at equal distance from previous prime (70013653) and next prime (70013677).

It can be written as a sum of positive squares in 4 ways, for example, as 5564881 + 64448784 = 2359^2 + 8028^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70013665 - 2¹⁹ = 69489377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114472 + ... + 115081.

It is an arithmetic number, because the mean of its divisors is an integer number (10674261).

Almost surely, 2^70013665 is an apocalyptic number.

It is an amenable number.

70013665 is a deficient number, since it is larger than the sum of its proper divisors (15380423).

70013665 is a wasteful number, since it uses less digits than its factorization.

70013665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229619.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 70013665 is about 8367.4168654370. The cubic root of 70013665 is about 412.1553460282.

It can be divided in two parts, 700 and 13665, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 70013665 in words is "seventy million, thirteen thousand, six hundred sixty-five".