70038665 has 4 divisors (see below), whose sum is σ = 84046404. Its totient is φ = 56030928.

The previous prime is 70038659. The next prime is 70038667. The reversal of 70038665 is 56683007.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56683007 = 197 ⋅287731.

It can be written as a sum of positive squares in 2 ways, for example, as 49716601 + 20322064 = 7051^2 + 4508^2 .

It is a cyclic number.

It is not a de Polignac number, because 70038665 - 2⁴ = 70038649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70038667) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7003862 + ... + 7003871.

It is an arithmetic number, because the mean of its divisors is an integer number (21011601).

Almost surely, 2^70038665 is an apocalyptic number.

It is an amenable number.

70038665 is a deficient number, since it is larger than the sum of its proper divisors (14007739).

70038665 is a wasteful number, since it uses less digits than its factorization.

70038665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14007738.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 70038665 is about 8368.9106220583. The cubic root of 70038665 is about 412.2043967265.

The spelling of 70038665 in words is "seventy million, thirty-eight thousand, six hundred sixty-five".