290229605666 has 64 divisors (see below), whose sum is σ = 585570021120. Its totient is φ = 104190485760.

The previous prime is 290229605641. The next prime is 290229605693. The reversal of 290229605666 is 666506922092.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 984980 + ... + 1245248.

It is an arithmetic number, because the mean of its divisors is an integer number (9149531580).

Almost surely, 2^290229605666 is an apocalyptic number.

290229605666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

290229605666 is an abundant number, since it is smaller than the sum of its proper divisors (295340415454).

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

290229605666 is a wasteful number, since it uses less digits than its factorization.

290229605666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260859.

The product of its (nonzero) digits is 4199040, while the sum is 53.

The spelling of 290229605666 in words is "two hundred ninety billion, two hundred twenty-nine million, six hundred five thousand, six hundred sixty-six".