61566116 has 6 divisors (see below), whose sum is σ = 107740710. Its totient is φ = 30783056.

The previous prime is 61566107. The next prime is 61566119. The reversal of 61566116 is 61166516.

It can be written as a sum of positive squares in only one way, i.e., 61559716 + 6400 = 7846^2 + 80^2 .

It is not an unprimeable number, because it can be changed into a prime (61566119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7695761 + ... + 7695768.

It is an arithmetic number, because the mean of its divisors is an integer number (17956785).

Almost surely, 2^61566116 is an apocalyptic number.

It is an amenable number.

61566116 is a deficient number, since it is larger than the sum of its proper divisors (46174594).

61566116 is a wasteful number, since it uses less digits than its factorization.

61566116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15391533 (or 15391531 counting only the distinct ones).

The product of its digits is 6480, while the sum is 32.

The square root of 61566116 is about 7846.4078405344. The cubic root of 61566116 is about 394.8637376492.

The spelling of 61566116 in words is "sixty-one million, five hundred sixty-six thousand, one hundred sixteen".