40666632612640 has 48 divisors (see below), whose sum is σ = 98671539008952. Its totient is φ = 15827013771264.

The previous prime is 40666632612581. The next prime is 40666632612647. The reversal of 40666632612640 is 4621623666604.

It can be written as a sum of positive squares in 4 ways, for example, as 40282733409424 + 383899203216 = 6346868^2 + 619596^2 .

It is not an unprimeable number, because it can be changed into a prime (40666632612647) 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, 3434675889 + ... + 3434687728.

Almost surely, 2^{40666632612640} is an apocalyptic number.

40666632612640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40666632612640 is an abundant number, since it is smaller than the sum of its proper divisors (58004906396312).

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

40666632612640 is a wasteful number, since it uses less digits than its factorization.

40666632612640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6869363669 (or 6869363661 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 52.

The spelling of 40666632612640 in words is "forty trillion, six hundred sixty-six billion, six hundred thirty-two million, six hundred twelve thousand, six hundred forty".