372665221621 has 8 divisors (see below), whose sum is σ = 464621575104. Its totient is φ = 290388484320.

The previous prime is 372665221603. The next prime is 372665221631. The reversal of 372665221621 is 126122566273.

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

It is not a de Polignac number, because 372665221621 - 2²⁷ = 372531003893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (372665221601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2419903960 + ... + 2419904113.

It is an arithmetic number, because the mean of its divisors is an integer number (58077696888).

Almost surely, 2^372665221621 is an apocalyptic number.

It is an amenable number.

372665221621 is a deficient number, since it is larger than the sum of its proper divisors (91956353483).

372665221621 is a wasteful number, since it uses less digits than its factorization.

372665221621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4839808091.

The product of its digits is 362880, while the sum is 43.

Adding to 372665221621 its reverse (126122566273), we get a palindrome (498787787894).

The spelling of 372665221621 in words is "three hundred seventy-two billion, six hundred sixty-five million, two hundred twenty-one thousand, six hundred twenty-one".