4166721002 has 4 divisors (see below), whose sum is σ = 6250081506. Its totient is φ = 2083360500.

The previous prime is 4166721001. The next prime is 4166721007. The reversal of 4166721002 is 2001276614.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2001276614 = 2 ⋅1000638307.

It can be written as a sum of positive squares in only one way, i.e., 3304065361 + 862655641 = 57481^2 + 29371^2 .

It is not an unprimeable number, because it can be changed into a prime (4166721001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1041680249 + ... + 1041680252.

Almost surely, 2^4166721002 is an apocalyptic number.

4166721002 is a deficient number, since it is larger than the sum of its proper divisors (2083360504).

4166721002 is a wasteful number, since it uses less digits than its factorization.

4166721002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083360503.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 4166721002 is about 64550.1433151004. The cubic root of 4166721002 is about 1609.1559690040.

Adding to 4166721002 its reverse (2001276614), we get a palindrome (6167997616).

The spelling of 4166721002 in words is "four billion, one hundred sixty-six million, seven hundred twenty-one thousand, two".