61566394 has 8 divisors (see below), whose sum is σ = 92651328. Its totient is φ = 30682620.

The previous prime is 61566389. The next prime is 61566397. The reversal of 61566394 is 49366516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (61566397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49522 + ... + 50749.

It is an arithmetic number, because the mean of its divisors is an integer number (11581416).

Almost surely, 2^61566394 is an apocalyptic number.

61566394 is a deficient number, since it is larger than the sum of its proper divisors (31084934).

61566394 is a wasteful number, since it uses less digits than its factorization.

61566394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100580.

The product of its digits is 116640, while the sum is 40.

The square root of 61566394 is about 7846.4255556272. The cubic root of 61566394 is about 394.8643319802.

The spelling of 61566394 in words is "sixty-one million, five hundred sixty-six thousand, three hundred ninety-four".