669676410 has 384 divisors, whose sum is σ = 2179457280. Its totient is φ = 146313216.

The previous prime is 669676409. The next prime is 669676429. The reversal of 669676410 is 14676966.

It is a happy number.

669676410 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×669676410² = 896932988220976200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 15573849 + ... + 15573891.

It is an arithmetic number, because the mean of its divisors is an integer number (5675670).

Almost surely, 2^669676410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669676410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089728640).

669676410 is an abundant number, since it is smaller than the sum of its proper divisors (1509780870).

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

669676410 is a wasteful number, since it uses less digits than its factorization.

669676410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 669676410 is about 25878.1067700093. The cubic root of 669676410 is about 874.8931178291.

The spelling of 669676410 in words is "six hundred sixty-nine million, six hundred seventy-six thousand, four hundred ten".