20435650666 has 24 divisors (see below), whose sum is σ = 33255556416. Its totient is φ = 9412152000.

The previous prime is 20435650663. The next prime is 20435650727. The reversal of 20435650666 is 66605653402.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20435650663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348960 + ... + 403291.

It is an arithmetic number, because the mean of its divisors is an integer number (1385648184).

Almost surely, 2^20435650666 is an apocalyptic number.

20435650666 is a deficient number, since it is larger than the sum of its proper divisors (12819905750).

20435650666 is a wasteful number, since it uses less digits than its factorization.

20435650666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752334 (or 752317 counting only the distinct ones).

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

The spelling of 20435650666 in words is "twenty billion, four hundred thirty-five million, six hundred fifty thousand, six hundred sixty-six".