61566043 has 32 divisors (see below), whose sum is σ = 80640000. Its totient is φ = 45601920.

The previous prime is 61565971. The next prime is 61566047. The reversal of 61566043 is 34066516.

It is not a de Polignac number, because 61566043 - 2²⁵ = 28011611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61565996 and 61566014.

It is not an unprimeable number, because it can be changed into a prime (61566047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176233 + ... + 176581.

It is an arithmetic number, because the mean of its divisors is an integer number (2520000).

Almost surely, 2^61566043 is an apocalyptic number.

61566043 is a deficient number, since it is larger than the sum of its proper divisors (19073957).

61566043 is a wasteful number, since it uses less digits than its factorization.

61566043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 61566043 is about 7846.4031887228. The cubic root of 61566043 is about 394.8635815835.

The spelling of 61566043 in words is "sixty-one million, five hundred sixty-six thousand, forty-three".