70806861 has 12 divisors (see below), whose sum is σ = 103678588. Its totient is φ = 46557504.

The previous prime is 70806859. The next prime is 70806871. The reversal of 70806861 is 16860807.

It can be written as a sum of positive squares in 2 ways, for example, as 19053225 + 51753636 = 4365^2 + 7194^2 .

It is not a de Polignac number, because 70806861 - 2¹ = 70806859 is a prime.

It is a super-2 number, since 2×70806861² = 10027223129346642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70806871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53230 + ... + 54543.

Almost surely, 2^70806861 is an apocalyptic number.

It is an amenable number.

70806861 is a deficient number, since it is larger than the sum of its proper divisors (32871727).

70806861 is a wasteful number, since it uses less digits than its factorization.

70806861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107852 (or 107849 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 70806861 is about 8414.6812773866. The cubic root of 70806861 is about 413.7059628867.

The spelling of 70806861 in words is "seventy million, eight hundred six thousand, eight hundred sixty-one".