1820517066 has 16 divisors (see below), whose sum is σ = 4045593600. Its totient is φ = 606839004.

The previous prime is 1820517047. The next prime is 1820517071. The reversal of 1820517066 is 6607150281.

1820517066 is a `hidden beast` number, since 1 + 82 + 0 + 517 + 0 + 66 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1820517066.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16856586 + ... + 16856693.

It is an arithmetic number, because the mean of its divisors is an integer number (252849600).

Almost surely, 2^1820517066 is an apocalyptic number.

1820517066 is an abundant number, since it is smaller than the sum of its proper divisors (2225076534).

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

1820517066 is a wasteful number, since it uses less digits than its factorization.

1820517066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33713290 (or 33713284 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 1820517066 is about 42667.5176920336. The cubic root of 1820517066 is about 1221.0447616839.

The spelling of 1820517066 in words is "one billion, eight hundred twenty million, five hundred seventeen thousand, sixty-six".