70858661 has 2 divisors, whose sum is σ = 70858662. Its totient is φ = 70858660.

The previous prime is 70858651. The next prime is 70858673. The reversal of 70858661 is 16685807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37149025 + 33709636 = 6095^2 + 5806^2 .

It is an emirp because it is prime and its reverse (16685807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70858661 - 2¹⁰ = 70857637 is a prime.

It is a super-3 number, since 3×70858661³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70858621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35429330 + 35429331.

It is an arithmetic number, because the mean of its divisors is an integer number (35429331).

Almost surely, 2^70858661 is an apocalyptic number.

It is an amenable number.

70858661 is a deficient number, since it is larger than the sum of its proper divisors (1).

70858661 is an equidigital number, since it uses as much as digits as its factorization.

70858661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 70858661 is about 8417.7586684343. The cubic root of 70858661 is about 413.8068229111.

The spelling of 70858661 in words is "seventy million, eight hundred fifty-eight thousand, six hundred sixty-one".