2001662056 has 8 divisors (see below), whose sum is σ = 3753116370. Its totient is φ = 1000831024.

The previous prime is 2001662029. The next prime is 2001662057. The reversal of 2001662056 is 6502661002.

It can be written as a sum of positive squares in only one way, i.e., 1179922500 + 821739556 = 34350^2 + 28666^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2001662057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125103871 + ... + 125103886.

Almost surely, 2^2001662056 is an apocalyptic number.

It is an amenable number.

2001662056 is a deficient number, since it is larger than the sum of its proper divisors (1751454314).

2001662056 is a wasteful number, since it uses less digits than its factorization.

2001662056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250207763 (or 250207759 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 2001662056 is about 44739.9380419777. The cubic root of 2001662056 is about 1260.2699631506.

It can be divided in two parts, 20016620 and 56, that added together give a square (20016676 = 4474²).

The spelling of 2001662056 in words is "two billion, one million, six hundred sixty-two thousand, fifty-six".