61566119 has 2 divisors, whose sum is σ = 61566120. Its totient is φ = 61566118.

The previous prime is 61566107. The next prime is 61566139. The reversal of 61566119 is 91166516.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61566119 is a prime.

It is a super-2 number, since 2×61566119² = 7580774017444322, which contains 22 as substring.

It is a Chen prime.

It is equal to p_3649427 and since 61566119 and 3649427 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61566139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30783059 + 30783060.

It is an arithmetic number, because the mean of its divisors is an integer number (30783060).

Almost surely, 2^61566119 is an apocalyptic number.

61566119 is a deficient number, since it is larger than the sum of its proper divisors (1).

61566119 is an equidigital number, since it uses as much as digits as its factorization.

61566119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 35.

The square root of 61566119 is about 7846.4080317047. The cubic root of 61566119 is about 394.8637440628.

The spelling of 61566119 in words is "sixty-one million, five hundred sixty-six thousand, one hundred nineteen".