2666431423540 has 48 divisors (see below), whose sum is σ = 5650186493952. Its totient is φ = 1056938754816.

The previous prime is 2666431423531. The next prime is 2666431423541. The reversal of 2666431423540 is 453241346662.

It is a happy number.

It is a super-2 number, since 2×2666431423540² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666431423541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1564309 + ... + 2789251.

It is an arithmetic number, because the mean of its divisors is an integer number (117712218624).

Almost surely, 2^{2666431423540} is an apocalyptic number.

2666431423540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2666431423540 is an abundant number, since it is smaller than the sum of its proper divisors (2983755070412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2666431423540 is a wasteful number, since it uses less digits than its factorization.

2666431423540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225936 (or 1225934 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 46.

The spelling of 2666431423540 in words is "two trillion, six hundred sixty-six billion, four hundred thirty-one million, four hundred twenty-three thousand, five hundred forty".