464631661 has 16 divisors (see below), whose sum is σ = 507177216. Its totient is φ = 423092736.

The previous prime is 464631653. The next prime is 464631677. The reversal of 464631661 is 166136464.

It is a cyclic number.

It is not a de Polignac number, because 464631661 - 2³ = 464631653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 464631661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (464631691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472176 + ... + 473158.

It is an arithmetic number, because the mean of its divisors is an integer number (31698576).

Almost surely, 2^464631661 is an apocalyptic number.

It is an amenable number.

464631661 is a deficient number, since it is larger than the sum of its proper divisors (42545555).

464631661 is a wasteful number, since it uses less digits than its factorization.

464631661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452.

The product of its digits is 62208, while the sum is 37.

The square root of 464631661 is about 21555.3163048005. The cubic root of 464631661 is about 774.5264736888.

The spelling of 464631661 in words is "four hundred sixty-four million, six hundred thirty-one thousand, six hundred sixty-one".