70108161661 has 4 divisors (see below), whose sum is σ = 70109154400. Its totient is φ = 70107168924.

The previous prime is 70108161649. The next prime is 70108161667. The reversal of 70108161661 is 16616180107.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70108161661 is a prime.

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 70108161661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70108161667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381591 + ... + 534628.

It is an arithmetic number, because the mean of its divisors is an integer number (17527288600).

Almost surely, 2^70108161661 is an apocalyptic number.

It is an amenable number.

70108161661 is a deficient number, since it is larger than the sum of its proper divisors (992739).

70108161661 is an equidigital number, since it uses as much as digits as its factorization.

70108161661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992738.

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 70108161661 in words is "seventy billion, one hundred eight million, one hundred sixty-one thousand, six hundred sixty-one".