662621401221 has 8 divisors (see below), whose sum is σ = 951456371040. Its totient is φ = 407767016112.

The previous prime is 662621401201. The next prime is 662621401261. The reversal of 662621401221 is 122104126266.

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

It is not a de Polignac number, because 662621401221 - 2⁷ = 662621401093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662621401201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8495146131 + ... + 8495146208.

It is an arithmetic number, because the mean of its divisors is an integer number (118932046380).

Almost surely, 2^662621401221 is an apocalyptic number.

It is an amenable number.

662621401221 is a deficient number, since it is larger than the sum of its proper divisors (288834969819).

662621401221 is a wasteful number, since it uses less digits than its factorization.

662621401221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16990292355.

The product of its (nonzero) digits is 13824, while the sum is 33.

Adding to 662621401221 its reverse (122104126266), we get a palindrome (784725527487).

The spelling of 662621401221 in words is "six hundred sixty-two billion, six hundred twenty-one million, four hundred one thousand, two hundred twenty-one".