61820005066 has 32 divisors (see below), whose sum is σ = 95119447680. Its totient is φ = 30124180800.

The previous prime is 61820005003. The next prime is 61820005073. The reversal of 61820005066 is 66050002816.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5889675 + ... + 5900161.

It is an arithmetic number, because the mean of its divisors is an integer number (2972482740).

Almost surely, 2^61820005066 is an apocalyptic number.

61820005066 is a deficient number, since it is larger than the sum of its proper divisors (33299442614).

61820005066 is a wasteful number, since it uses less digits than its factorization.

61820005066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10990.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 61820005066 in words is "sixty-one billion, eight hundred twenty million, five thousand, sixty-six".