70666801 has 4 divisors (see below), whose sum is σ = 71460900. Its totient is φ = 69872704.

The previous prime is 70666793. The next prime is 70666811. The reversal of 70666801 is 10866607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10866607 = 1571 ⋅6917.

It can be written as a sum of positive squares in 2 ways, for example, as 15610401 + 55056400 = 3951^2 + 7420^2 .

It is a cyclic number.

It is not a de Polignac number, because 70666801 - 2³ = 70666793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70666811) 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, 396916 + ... + 397093.

It is an arithmetic number, because the mean of its divisors is an integer number (17865225).

Almost surely, 2^70666801 is an apocalyptic number.

It is an amenable number.

70666801 is a deficient number, since it is larger than the sum of its proper divisors (794099).

70666801 is an equidigital number, since it uses as much as digits as its factorization.

70666801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794098.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 70666801 is about 8406.3547986033. The cubic root of 70666801 is about 413.4330048538.

The spelling of 70666801 in words is "seventy million, six hundred sixty-six thousand, eight hundred one".