61249431966 has 32 divisors (see below), whose sum is σ = 129447970560. Its totient is φ = 19266656256.

The previous prime is 61249431959. The next prime is 61249431967. The reversal of 61249431966 is 66913494216.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61249431967) 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, 1015986 + ... + 1074581.

It is an arithmetic number, because the mean of its divisors is an integer number (4045249080).

Almost surely, 2^61249431966 is an apocalyptic number.

61249431966 is an abundant number, since it is smaller than the sum of its proper divisors (68198538594).

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

61249431966 is a wasteful number, since it uses less digits than its factorization.

61249431966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090848.

The product of its digits is 1679616, while the sum is 51.

The spelling of 61249431966 in words is "sixty-one billion, two hundred forty-nine million, four hundred thirty-one thousand, nine hundred sixty-six".