372221666 has 8 divisors (see below), whose sum is σ = 587718480. Its totient is φ = 176315508.

The previous prime is 372221621. The next prime is 372221669. The reversal of 372221666 is 666122273.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (372221669) 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, 4897616 + ... + 4897691.

It is an arithmetic number, because the mean of its divisors is an integer number (73464810).

Almost surely, 2^372221666 is an apocalyptic number.

372221666 is a deficient number, since it is larger than the sum of its proper divisors (215496814).

372221666 is a wasteful number, since it uses less digits than its factorization.

372221666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9795328.

The product of its digits is 36288, while the sum is 35.

The square root of 372221666 is about 19293.0470895605. The cubic root of 372221666 is about 719.3394572042.

The spelling of 372221666 in words is "three hundred seventy-two million, two hundred twenty-one thousand, six hundred sixty-six".