669063654 has 24 divisors (see below), whose sum is σ = 1656729360. Its totient is φ = 191161008.

The previous prime is 669063653. The next prime is 669063667. The reversal of 669063654 is 456360966.

669063654 is a `hidden beast` number, since 6 + 6 + 9 + 0 + 636 + 5 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669063653) 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, 2654889 + ... + 2655140.

It is an arithmetic number, because the mean of its divisors is an integer number (69030390).

Almost surely, 2^669063654 is an apocalyptic number.

669063654 is an abundant number, since it is smaller than the sum of its proper divisors (987665706).

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

669063654 is a wasteful number, since it uses less digits than its factorization.

669063654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5310044 (or 5310041 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The square root of 669063654 is about 25866.2647863970. The cubic root of 669063654 is about 874.6261930914.

The spelling of 669063654 in words is "six hundred sixty-nine million, sixty-three thousand, six hundred fifty-four".