669854654 has 32 divisors (see below), whose sum is σ = 1167022080. Its totient is φ = 282435552.

The previous prime is 669854641. The next prime is 669854687. The reversal of 669854654 is 456458966.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 669854596 and 669854605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311507 + ... + 313649.

It is an arithmetic number, because the mean of its divisors is an integer number (36469440).

Almost surely, 2^669854654 is an apocalyptic number.

669854654 is a deficient number, since it is larger than the sum of its proper divisors (497167426).

669854654 is a wasteful number, since it uses less digits than its factorization.

669854654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504.

The product of its digits is 6220800, while the sum is 53.

The square root of 669854654 is about 25881.5504558749. The cubic root of 669854654 is about 874.9707327354.

The spelling of 669854654 in words is "six hundred sixty-nine million, eight hundred fifty-four thousand, six hundred fifty-four".