61566059 has 2 divisors, whose sum is σ = 61566060. Its totient is φ = 61566058.

The previous prime is 61566047. The next prime is 61566091. The reversal of 61566059 is 95066516.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61566059 is a prime.

It is not a weakly prime, because it can be changed into another prime (61565059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30783029 + 30783030.

It is an arithmetic number, because the mean of its divisors is an integer number (30783030).

Almost surely, 2^61566059 is an apocalyptic number.

61566059 is a deficient number, since it is larger than the sum of its proper divisors (1).

61566059 is an equidigital number, since it uses as much as digits as its factorization.

61566059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 61566059 is about 7846.4042082982. The cubic root of 61566059 is about 394.8636157897.

The spelling of 61566059 in words is "sixty-one million, five hundred sixty-six thousand, fifty-nine".