4030664821 has 4 divisors (see below), whose sum is σ = 4031458252. Its totient is φ = 4029871392.

The previous prime is 4030664783. The next prime is 4030664839. The reversal of 4030664821 is 1284660304.

4030664821 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 434263921 + 3596400900 = 20839^2 + 59970^2 .

It is a cyclic number.

It is not a de Polignac number, because 4030664821 - 2¹³ = 4030656629 is a prime.

It is a super-4 number, since 4×4030664821⁴ (a number of 40 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4030664881) 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, 389046 + ... + 399271.

It is an arithmetic number, because the mean of its divisors is an integer number (1007864563).

Almost surely, 2^4030664821 is an apocalyptic number.

It is an amenable number.

4030664821 is a deficient number, since it is larger than the sum of its proper divisors (793431).

4030664821 is an equidigital number, since it uses as much as digits as its factorization.

4030664821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793430.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 4030664821 is about 63487.5170486293. The cubic root of 4030664821 is about 1591.4471774653.

The spelling of 4030664821 in words is "four billion, thirty million, six hundred sixty-four thousand, eight hundred twenty-one".