4157721466 has 8 divisors (see below), whose sum is σ = 6237406260. Its totient is φ = 2078586048.

The previous prime is 4157721461. The next prime is 4157721517. The reversal of 4157721466 is 6641277514.

It can be written as a sum of positive squares in 2 ways, for example, as 3815656441 + 342065025 = 61771^2 + 18495^2 .

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

It is not an unprimeable number, because it can be changed into a prime (4157721461) 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, 117871 + ... + 149026.

Almost surely, 2^4157721466 is an apocalyptic number.

4157721466 is a deficient number, since it is larger than the sum of its proper divisors (2079684794).

4157721466 is a wasteful number, since it uses less digits than its factorization.

4157721466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274688.

The product of its digits is 282240, while the sum is 43.

The square root of 4157721466 is about 64480.3959820347. The cubic root of 4157721466 is about 1607.9966164648.

The spelling of 4157721466 in words is "four billion, one hundred fifty-seven million, seven hundred twenty-one thousand, four hundred sixty-six".