70660561 has 2 divisors, whose sum is σ = 70660562. Its totient is φ = 70660560.

The previous prime is 70660543. The next prime is 70660591. The reversal of 70660561 is 16506607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42771600 + 27888961 = 6540^2 + 5281^2 .

It is a cyclic number.

It is not a de Polignac number, because 70660561 - 2⁵ = 70660529 is a prime.

It is not a weakly prime, because it can be changed into another prime (70660591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35330280 + 35330281.

It is an arithmetic number, because the mean of its divisors is an integer number (35330281).

Almost surely, 2^70660561 is an apocalyptic number.

It is an amenable number.

70660561 is a deficient number, since it is larger than the sum of its proper divisors (1).

70660561 is an equidigital number, since it uses as much as digits as its factorization.

70660561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 70660561 is about 8405.9836426203. The cubic root of 70660561 is about 413.4208355473.

The spelling of 70660561 in words is "seventy million, six hundred sixty thousand, five hundred sixty-one".