70066919 has 4 divisors (see below), whose sum is σ = 75456696. Its totient is φ = 64677144.

The previous prime is 70066907. The next prime is 70066939. The reversal of 70066919 is 91966007.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91966007 = 7 ⋅13138001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70066919 is a prime.

It is a super-4 number, since 4×70066919⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70066939) 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, 2694869 + ... + 2694894.

It is an arithmetic number, because the mean of its divisors is an integer number (18864174).

Almost surely, 2^70066919 is an apocalyptic number.

70066919 is a deficient number, since it is larger than the sum of its proper divisors (5389777).

70066919 is a wasteful number, since it uses less digits than its factorization.

70066919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5389776.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 70066919 is about 8370.5984851742. The cubic root of 70066919 is about 412.2598178157.

The spelling of 70066919 in words is "seventy million, sixty-six thousand, nine hundred nineteen".