61872201966 has 32 divisors (see below), whose sum is σ = 123953483520. Its totient is φ = 20589254336.

The previous prime is 61872201953. The next prime is 61872202013. The reversal of 61872201966 is 66910227816.

It is a super-2 number, since 2×61872201966² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10969375 + ... + 10975013.

It is an arithmetic number, because the mean of its divisors is an integer number (3873546360).

Almost surely, 2^61872201966 is an apocalyptic number.

61872201966 is an abundant number, since it is smaller than the sum of its proper divisors (62081281554).

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

61872201966 is a wasteful number, since it uses less digits than its factorization.

61872201966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8408.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 61872201966 in words is "sixty-one billion, eight hundred seventy-two million, two hundred one thousand, nine hundred sixty-six".