40221166390 has 8 divisors (see below), whose sum is σ = 72398099520. Its totient is φ = 16088466552.

The previous prime is 40221166373. The next prime is 40221166397. The reversal of 40221166390 is 9366112204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221166397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011058310 + ... + 2011058329.

It is an arithmetic number, because the mean of its divisors is an integer number (9049762440).

Almost surely, 2^40221166390 is an apocalyptic number.

40221166390 is a deficient number, since it is larger than the sum of its proper divisors (32176933130).

40221166390 is a wasteful number, since it uses less digits than its factorization.

40221166390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022116646.

The product of its (nonzero) digits is 15552, while the sum is 34.

Adding to 40221166390 its reverse (9366112204), we get a palindrome (49587278594).

The spelling of 40221166390 in words is "forty billion, two hundred twenty-one million, one hundred sixty-six thousand, three hundred ninety".