40466642640 has 80 divisors (see below), whose sum is σ = 125505175488. Its totient is φ = 10786065408.

The previous prime is 40466642633. The next prime is 40466642663. The reversal of 40466642640 is 4624666404.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 40466642592 and 40466642601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 490452 + ... + 566988.

Almost surely, 2^40466642640 is an apocalyptic number.

40466642640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40466642640 is an abundant number, since it is smaller than the sum of its proper divisors (85038532848).

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

40466642640 is a wasteful number, since it uses less digits than its factorization.

40466642640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78756 (or 78750 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 40466642640 in words is "forty billion, four hundred sixty-six million, six hundred forty-two thousand, six hundred forty".