40663555 has 16 divisors (see below), whose sum is σ = 50818464. Its totient is φ = 31207680.

The previous prime is 40663549. The next prime is 40663559. The reversal of 40663555 is 55536604.

It is not a de Polignac number, because 40663555 - 2³ = 40663547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40663555.

It is not an unprimeable number, because it can be changed into a prime (40663559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12000 + ... + 15010.

It is an arithmetic number, because the mean of its divisors is an integer number (3176154).

Almost surely, 2^40663555 is an apocalyptic number.

40663555 is a deficient number, since it is larger than the sum of its proper divisors (10154909).

40663555 is a wasteful number, since it uses less digits than its factorization.

40663555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3126.

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 40663555 is about 6376.7981777692. The cubic root of 40663555 is about 343.8759327019.

The spelling of 40663555 in words is "forty million, six hundred sixty-three thousand, five hundred fifty-five".