70706681 has 2 divisors, whose sum is σ = 70706682. Its totient is φ = 70706680.

The previous prime is 70706651. The next prime is 70706707. The reversal of 70706681 is 18660707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61152400 + 9554281 = 7820^2 + 3091^2 .

It is a cyclic number.

It is not a de Polignac number, because 70706681 - 2⁶ = 70706617 is a prime.

It is a super-2 number, since 2×70706681² = 9998869476071522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70706651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35353340 + 35353341.

It is an arithmetic number, because the mean of its divisors is an integer number (35353341).

Almost surely, 2^70706681 is an apocalyptic number.

It is an amenable number.

70706681 is a deficient number, since it is larger than the sum of its proper divisors (1).

70706681 is an equidigital number, since it uses as much as digits as its factorization.

70706681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 70706681 is about 8408.7264790811. The cubic root of 70706681 is about 413.5107622893.

The spelling of 70706681 in words is "seventy million, seven hundred six thousand, six hundred eighty-one".