40664446551 has 32 divisors (see below), whose sum is σ = 63631008000. Its totient is φ = 25595059104.

The previous prime is 40664446547. The next prime is 40664446561. The reversal of 40664446551 is 15564446604.

40664446551 is a `hidden beast` number, since 40 + 66 + 44 + 465 + 51 = 666.

It is not a de Polignac number, because 40664446551 - 2² = 40664446547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40664446497 and 40664446506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40664446561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15040 + ... + 285578.

It is an arithmetic number, because the mean of its divisors is an integer number (1988469000).

Almost surely, 2^40664446551 is an apocalyptic number.

40664446551 is a deficient number, since it is larger than the sum of its proper divisors (22966561449).

40664446551 is a wasteful number, since it uses less digits than its factorization.

40664446551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270860 (or 270854 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 40664446551 in words is "forty billion, six hundred sixty-four million, four hundred forty-six thousand, five hundred fifty-one".