669772092 has 48 divisors (see below), whose sum is σ = 1718341632. Its totient is φ = 201358080.

The previous prime is 669772087. The next prime is 669772093. The reversal of 669772092 is 290277966.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669772093) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3213 + ... + 36740.

It is an arithmetic number, because the mean of its divisors is an integer number (35798784).

Almost surely, 2^669772092 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 669772092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (859170816).

669772092 is an abundant number, since it is smaller than the sum of its proper divisors (1048569540).

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

669772092 is a wasteful number, since it uses less digits than its factorization.

669772092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40098 (or 40096 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 48.

The square root of 669772092 is about 25879.9554095443. The cubic root of 669772092 is about 874.9347834931.

The spelling of 669772092 in words is "six hundred sixty-nine million, seven hundred seventy-two thousand, ninety-two".