40664261630655 has 96 divisors (see below), whose sum is σ = 76987519120512. Its totient is φ = 19734343372800.

The previous prime is 40664261630647. The next prime is 40664261630687. The reversal of 40664261630655 is 55603616246604.

40664261630655 is a `hidden beast` number, since 4 + 0 + 6 + 6 + 426 + 163 + 0 + 6 + 55 = 666.

It is not a de Polignac number, because 40664261630655 - 2³ = 40664261630647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 284069379 + ... + 284212491.

It is an arithmetic number, because the mean of its divisors is an integer number (801953324172).

Almost surely, 2^{40664261630655} is an apocalyptic number.

40664261630655 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40664261630655 is a deficient number, since it is larger than the sum of its proper divisors (36323257489857).

40664261630655 is a wasteful number, since it uses less digits than its factorization.

40664261630655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150049 (or 150046 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 54.

The spelling of 40664261630655 in words is "forty trillion, six hundred sixty-four billion, two hundred sixty-one million, six hundred thirty thousand, six hundred fifty-five".