2431667661 has 8 divisors (see below), whose sum is σ = 3354024480. Its totient is φ = 1565211312.

The previous prime is 2431667659. The next prime is 2431667677. The reversal of 2431667661 is 1667661342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2431667661 - 2¹ = 2431667659 is a prime.

It is a super-2 number, since 2×2431667661² = 11826015227106421842, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2431667611) 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, 13975015 + ... + 13975188.

It is an arithmetic number, because the mean of its divisors is an integer number (419253060).

Almost surely, 2^2431667661 is an apocalyptic number.

It is an amenable number.

2431667661 is a deficient number, since it is larger than the sum of its proper divisors (922356819).

2431667661 is a wasteful number, since it uses less digits than its factorization.

2431667661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27950235.

The product of its digits is 217728, while the sum is 42.

The square root of 2431667661 is about 49311.9423770754. The cubic root of 2431667661 is about 1344.7289035944.

The spelling of 2431667661 in words is "two billion, four hundred thirty-one million, six hundred sixty-seven thousand, six hundred sixty-one".