2431606661 has 4 divisors (see below), whose sum is σ = 2652661824. Its totient is φ = 2210551500.

The previous prime is 2431606633. The next prime is 2431606687. The reversal of 2431606661 is 1666061342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2431606661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2431606601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110527565 + ... + 110527586.

It is an arithmetic number, because the mean of its divisors is an integer number (663165456).

Almost surely, 2^2431606661 is an apocalyptic number.

It is an amenable number.

2431606661 is a deficient number, since it is larger than the sum of its proper divisors (221055163).

2431606661 is a wasteful number, since it uses less digits than its factorization.

2431606661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221055162.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 2431606661 is about 49311.3238617663. The cubic root of 2431606661 is about 1344.7176590275.

The spelling of 2431606661 in words is "two billion, four hundred thirty-one million, six hundred six thousand, six hundred sixty-one".