669771730 has 16 divisors (see below), whose sum is σ = 1258006464. Its totient is φ = 256260400.

The previous prime is 669771701. The next prime is 669771779. The reversal of 669771730 is 37177966.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

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, 1455796 + ... + 1456255.

It is an arithmetic number, because the mean of its divisors is an integer number (78625404).

Almost surely, 2^669771730 is an apocalyptic number.

669771730 is a deficient number, since it is larger than the sum of its proper divisors (588234734).

669771730 is a wasteful number, since it uses less digits than its factorization.

669771730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2912081.

The product of its (nonzero) digits is 333396, while the sum is 46.

The square root of 669771730 is about 25879.9484157137. The cubic root of 669771730 is about 874.9346258641.

The spelling of 669771730 in words is "six hundred sixty-nine million, seven hundred seventy-one thousand, seven hundred thirty".