66350000 has 60 divisors (see below), whose sum is σ = 160802208. Its totient is φ = 26520000.

The previous prime is 66349979. The next prime is 66350003. The reversal of 66350000 is 5366.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (66350003) 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, 49337 + ... + 50663.

Almost surely, 2^66350000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66350000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80401104).

66350000 is an abundant number, since it is smaller than the sum of its proper divisors (94452208).

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

66350000 is an equidigital number, since it uses as much as digits as its factorization.

66350000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360 (or 1334 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 66350000 is about 8145.5509328713. The cubic root of 66350000 is about 404.8371036204.

Adding to 66350000 its reverse (5366), we get a palindrome (66355366).

The spelling of 66350000 in words is "sixty-six million, three hundred fifty thousand".