40664550 has 24 divisors (see below), whose sum is σ = 100848456. Its totient is φ = 10843840.

The previous prime is 40664549. The next prime is 40664551. The reversal of 40664550 is 5546604.

It is an interprime number because it is at equal distance from previous prime (40664549) and next prime (40664551).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40664551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135399 + ... + 135698.

It is an arithmetic number, because the mean of its divisors is an integer number (4202019).

Almost surely, 2^40664550 is an apocalyptic number.

40664550 is an abundant number, since it is smaller than the sum of its proper divisors (60183906).

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

40664550 is a wasteful number, since it uses less digits than its factorization.

40664550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271112 (or 271107 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 40664550 is about 6376.8761945015. The cubic root of 40664550 is about 343.8787374556.

It can be divided in two parts, 40664 and 550, that added together give a palindrome (41214).

The spelling of 40664550 in words is "forty million, six hundred sixty-four thousand, five hundred fifty".