466397991 has 6 divisors (see below), whose sum is σ = 673686000. Its totient is φ = 310931988.

The previous prime is 466397927. The next prime is 466397993. The reversal of 466397991 is 199793664.

466397991 is a `hidden beast` number, since 466 + 3 + 97 + 9 + 91 = 666.

It is not a de Polignac number, because 466397991 - 2⁶ = 466397927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (466397993) 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 5 ways as a sum of consecutive naturals, for example, 25910991 + ... + 25911008.

It is an arithmetic number, because the mean of its divisors is an integer number (112281000).

Almost surely, 2^466397991 is an apocalyptic number.

466397991 is a deficient number, since it is larger than the sum of its proper divisors (207288009).

466397991 is a wasteful number, since it uses less digits than its factorization.

466397991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51822005 (or 51822002 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 466397991 is about 21596.2494660531. The cubic root of 466397991 is about 775.5067049193.

The spelling of 466397991 in words is "four hundred sixty-six million, three hundred ninety-seven thousand, nine hundred ninety-one".