669263788 has 6 divisors (see below), whose sum is σ = 1171211636. Its totient is φ = 334631892.

The previous prime is 669263767. The next prime is 669263789. The reversal of 669263788 is 887362966.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (669263789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83657970 + ... + 83657977.

Almost surely, 2^669263788 is an apocalyptic number.

It is an amenable number.

669263788 is a deficient number, since it is larger than the sum of its proper divisors (501947848).

669263788 is a wasteful number, since it uses less digits than its factorization.

669263788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167315951 (or 167315949 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 55.

The square root of 669263788 is about 25870.1331268318. The cubic root of 669263788 is about 874.7133920632.

The spelling of 669263788 in words is "six hundred sixty-nine million, two hundred sixty-three thousand, seven hundred eighty-eight".