390300066 has 64 divisors (see below), whose sum is σ = 944697600. Its totient is φ = 118723968.

The previous prime is 390300061. The next prime is 390300089. The reversal of 390300066 is 660003093.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (390300061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59355 + ... + 65601.

It is an arithmetic number, because the mean of its divisors is an integer number (14760900).

Almost surely, 2^390300066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390300066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (472348800).

390300066 is an abundant number, since it is smaller than the sum of its proper divisors (554397534).

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

390300066 is a wasteful number, since it uses less digits than its factorization.

390300066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360 (or 6354 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 390300066 is about 19756.0134136419. The cubic root of 390300066 is about 730.8016875994.

The spelling of 390300066 in words is "three hundred ninety million, three hundred thousand, sixty-six".