61659571 has 2 divisors, whose sum is σ = 61659572. Its totient is φ = 61659570.

The previous prime is 61659509. The next prime is 61659581. The reversal of 61659571 is 17595616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61659571 - 2⁷ = 61659443 is a prime.

It is not a weakly prime, because it can be changed into another prime (61659581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30829785 + 30829786.

It is an arithmetic number, because the mean of its divisors is an integer number (30829786).

Almost surely, 2^61659571 is an apocalyptic number.

61659571 is a deficient number, since it is larger than the sum of its proper divisors (1).

61659571 is an equidigital number, since it uses as much as digits as its factorization.

61659571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 40.

The square root of 61659571 is about 7852.3608551823. The cubic root of 61659571 is about 395.0634326372.

The spelling of 61659571 in words is "sixty-one million, six hundred fifty-nine thousand, five hundred seventy-one".