61566042 has 32 divisors (see below), whose sum is σ = 129971520. Its totient is φ = 19388160.

The previous prime is 61565971. The next prime is 61566047. The reversal of 61566042 is 24066516.

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 15 ways as a sum of consecutive naturals, for example, 69442 + ... + 70322.

It is an arithmetic number, because the mean of its divisors is an integer number (4061610).

Almost surely, 2^61566042 is an apocalyptic number.

61566042 is an abundant number, since it is smaller than the sum of its proper divisors (68405478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61566042 is a wasteful number, since it uses less digits than its factorization.

61566042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 61566042 is about 7846.4031249994. The cubic root of 61566042 is about 394.8635794456.

The spelling of 61566042 in words is "sixty-one million, five hundred sixty-six thousand, forty-two".