669700897 has 4 divisors (see below), whose sum is σ = 679133376. Its totient is φ = 660268420.

The previous prime is 669700861. The next prime is 669700921. The reversal of 669700897 is 798007966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669700897 is a prime.

It is a super-3 number, since 3×669700897³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669700807) 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, 4716133 + ... + 4716274.

It is an arithmetic number, because the mean of its divisors is an integer number (169783344).

Almost surely, 2^669700897 is an apocalyptic number.

It is an amenable number.

669700897 is a deficient number, since it is larger than the sum of its proper divisors (9432479).

669700897 is an equidigital number, since it uses as much as digits as its factorization.

669700897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9432478.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 669700897 is about 25878.5798876213. The cubic root of 669700897 is about 874.9037813109.

The spelling of 669700897 in words is "six hundred sixty-nine million, seven hundred thousand, eight hundred ninety-seven".