669897854 has 8 divisors (see below), whose sum is σ = 1039496760. Its totient is φ = 323398936.

The previous prime is 669897853. The next prime is 669897863. The reversal of 669897854 is 458798966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669897853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5774924 + ... + 5775039.

It is an arithmetic number, because the mean of its divisors is an integer number (129937095).

Almost surely, 2^669897854 is an apocalyptic number.

669897854 is a deficient number, since it is larger than the sum of its proper divisors (369598906).

669897854 is a wasteful number, since it uses less digits than its factorization.

669897854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11549994.

The product of its digits is 26127360, while the sum is 62.

The square root of 669897854 is about 25882.3850137502. The cubic root of 669897854 is about 874.9895417526.

The spelling of 669897854 in words is "six hundred sixty-nine million, eight hundred ninety-seven thousand, eight hundred fifty-four".