2661406431 has 8 divisors (see below), whose sum is σ = 3593460480. Its totient is φ = 1751811672.

The previous prime is 2661406421. The next prime is 2661406441. The reversal of 2661406431 is 1346041662.

It is an interprime number because it is at equal distance from previous prime (2661406421) and next prime (2661406441).

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

It is not a de Polignac number, because 2661406431 - 2¹⁴ = 2661390047 is a prime.

It is a super-2 number, since 2×2661406431² = 14166168381936315522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2661406392 and 2661406401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661406421) 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, 5614545 + ... + 5615018.

It is an arithmetic number, because the mean of its divisors is an integer number (449182560).

Almost surely, 2^2661406431 is an apocalyptic number.

2661406431 is a deficient number, since it is larger than the sum of its proper divisors (932054049).

2661406431 is a wasteful number, since it uses less digits than its factorization.

2661406431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11229645.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 2661406431 is about 51588.8207948195. The cubic root of 2661406431 is about 1385.8101375745.

The spelling of 2661406431 in words is "two billion, six hundred sixty-one million, four hundred six thousand, four hundred thirty-one".