70206641 has 4 divisors (see below), whose sum is σ = 70227300. Its totient is φ = 70185984.

The previous prime is 70206623. The next prime is 70206683. The reversal of 70206641 is 14660207.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14660207 = 83 ⋅176629.

It can be written as a sum of positive squares in 2 ways, for example, as 47128225 + 23078416 = 6865^2 + 4804^2 .

It is a cyclic number.

It is not a de Polignac number, because 70206641 - 2¹⁴ = 70190257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 70206641.

It is not an unprimeable number, because it can be changed into a prime (70206601) 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, 3896 + ... + 12473.

It is an arithmetic number, because the mean of its divisors is an integer number (17556825).

Almost surely, 2^70206641 is an apocalyptic number.

It is an amenable number.

70206641 is a deficient number, since it is larger than the sum of its proper divisors (20659).

70206641 is a wasteful number, since it uses less digits than its factorization.

70206641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20658.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 70206641 is about 8378.9403267955. The cubic root of 70206641 is about 412.5336680202.

Adding to 70206641 its reverse (14660207), we get a palindrome (84866848).

The spelling of 70206641 in words is "seventy million, two hundred six thousand, six hundred forty-one".