1666436802 has 32 divisors (see below), whose sum is σ = 3597713280. Its totient is φ = 513004800.

The previous prime is 1666436777. The next prime is 1666436803. The reversal of 1666436802 is 2086346661.

It is not an unprimeable number, because it can be changed into a prime (1666436803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204199 + ... + 212202.

It is an arithmetic number, because the mean of its divisors is an integer number (112428540).

Almost surely, 2^1666436802 is an apocalyptic number.

1666436802 is an abundant number, since it is smaller than the sum of its proper divisors (1931276478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666436802 is a wasteful number, since it uses less digits than its factorization.

1666436802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416458.

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 1666436802 is about 40822.0136935943. The cubic root of 1666436802 is about 1185.5765920511.

The spelling of 1666436802 in words is "one billion, six hundred sixty-six million, four hundred thirty-six thousand, eight hundred two".