70661659 has 2 divisors, whose sum is σ = 70661660. Its totient is φ = 70661658.

The previous prime is 70661651. The next prime is 70661663. The reversal of 70661659 is 95616607.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70661659 - 2³ = 70661651 is a prime.

It is not a weakly prime, because it can be changed into another prime (70661651) 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 as a sum of consecutive naturals, namely, 35330829 + 35330830.

It is an arithmetic number, because the mean of its divisors is an integer number (35330830).

Almost surely, 2^70661659 is an apocalyptic number.

70661659 is a deficient number, since it is larger than the sum of its proper divisors (1).

70661659 is an equidigital number, since it uses as much as digits as its factorization.

70661659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 70661659 is about 8406.0489529862. The cubic root of 70661659 is about 413.4229769291.

The spelling of 70661659 in words is "seventy million, six hundred sixty-one thousand, six hundred fifty-nine".