70661565019 has 4 divisors (see below), whose sum is σ = 70746802960. Its totient is φ = 70576327080.

The previous prime is 70661565017. The next prime is 70661565083. The reversal of 70661565019 is 91056516607.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70661565019 - 2¹ = 70661565017 is a prime.

It is a super-2 number, since 2×70661565019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70661565019.

It is not an unprimeable number, because it can be changed into a prime (70661565017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42617727 + ... + 42619384.

It is an arithmetic number, because the mean of its divisors is an integer number (17686700740).

Almost surely, 2^70661565019 is an apocalyptic number.

70661565019 is a deficient number, since it is larger than the sum of its proper divisors (85237941).

70661565019 is an equidigital number, since it uses as much as digits as its factorization.

70661565019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85237940.

The product of its (nonzero) digits is 340200, while the sum is 46.

The spelling of 70661565019 in words is "seventy billion, six hundred sixty-one million, five hundred sixty-five thousand, nineteen".