4256021066 has 16 divisors (see below), whose sum is σ = 7003311840. Its totient is φ = 1923745680.

The previous prime is 4256021047. The next prime is 4256021087. The reversal of 4256021066 is 6601206524.

It is a super-2 number, since 2×4256021066² = 36227430628471552712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536441 + ... + 544316.

It is an arithmetic number, because the mean of its divisors is an integer number (437706990).

Almost surely, 2^4256021066 is an apocalyptic number.

4256021066 is a deficient number, since it is larger than the sum of its proper divisors (2747290774).

4256021066 is a wasteful number, since it uses less digits than its factorization.

4256021066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080949.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 4256021066 is about 65238.1871759171. The cubic root of 4256021066 is about 1620.5704775889.

The spelling of 4256021066 in words is "four billion, two hundred fifty-six million, twenty-one thousand, sixty-six".