42166654335440 has 40 divisors (see below), whose sum is σ = 98039395908168. Its totient is φ = 16866330624000.

The previous prime is 42166654335397. The next prime is 42166654335451. The reversal of 42166654335440 is 4453345666124.

It can be written as a sum of positive squares in 4 ways, for example, as 540655504 + 42166113679936 = 23252^2 + 6493544^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1052561 + ... + 9243440.

Almost surely, 2^{42166654335440} is an apocalyptic number.

42166654335440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42166654335440 is an abundant number, since it is smaller than the sum of its proper divisors (55872741572728).

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

42166654335440 is a wasteful number, since it uses less digits than its factorization.

42166654335440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10347207 (or 10347201 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 53.

The spelling of 42166654335440 in words is "forty-two trillion, one hundred sixty-six billion, six hundred fifty-four million, three hundred thirty-five thousand, four hundred forty".