61566412 has 12 divisors (see below), whose sum is σ = 109039896. Its totient is φ = 30412160.

The previous prime is 61566397. The next prime is 61566413. The reversal of 61566412 is 21466516.

It is not an unprimeable number, because it can be changed into a prime (61566413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92389 + ... + 93052.

It is an arithmetic number, because the mean of its divisors is an integer number (9086658).

Almost surely, 2^61566412 is an apocalyptic number.

It is an amenable number.

61566412 is a deficient number, since it is larger than the sum of its proper divisors (47473484).

61566412 is a wasteful number, since it uses less digits than its factorization.

61566412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185528 (or 185526 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 61566412 is about 7846.4267026462. The cubic root of 61566412 is about 394.8643704620.

The spelling of 61566412 in words is "sixty-one million, five hundred sixty-six thousand, four hundred twelve".