461991966 has 16 divisors (see below), whose sum is σ = 978336144. Its totient is φ = 144938624.

The previous prime is 461991941. The next prime is 461991967. The reversal of 461991966 is 669199164.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461991967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2264565 + ... + 2264768.

It is an arithmetic number, because the mean of its divisors is an integer number (61146009).

Almost surely, 2^461991966 is an apocalyptic number.

461991966 is an abundant number, since it is smaller than the sum of its proper divisors (516344178).

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

461991966 is a wasteful number, since it uses less digits than its factorization.

461991966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4529355.

The product of its digits is 629856, while the sum is 51.

The square root of 461991966 is about 21493.9983716385. The cubic root of 461991966 is about 773.0569241467.

The spelling of 461991966 in words is "four hundred sixty-one million, nine hundred ninety-one thousand, nine hundred sixty-six".