2066435656 has 16 divisors (see below), whose sum is σ = 3947672700. Its totient is φ = 1013722944.

The previous prime is 2066435653. The next prime is 2066435737. The reversal of 2066435656 is 6565346602.

It can be written as a sum of positive squares in 2 ways, for example, as 2052996100 + 13439556 = 45310^2 + 3666^2 .

It is not an unprimeable number, because it can be changed into a prime (2066435653) 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, 2436411 + ... + 2437258.

Almost surely, 2^2066435656 is an apocalyptic number.

It is an amenable number.

2066435656 is a deficient number, since it is larger than the sum of its proper divisors (1881237044).

2066435656 is a wasteful number, since it uses less digits than its factorization.

2066435656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4873728 (or 4873724 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 43.

The square root of 2066435656 is about 45458.0648070285. The cubic root of 2066435656 is about 1273.7199827858.

The spelling of 2066435656 in words is "two billion, sixty-six million, four hundred thirty-five thousand, six hundred fifty-six".