669897696 has 48 divisors (see below), whose sum is σ = 1893752784. Its totient is φ = 206121984.

The previous prime is 669897671. The next prime is 669897703. The reversal of 669897696 is 696798966.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×669897696² = 897525846212216832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267141 + ... + 269636.

It is an arithmetic number, because the mean of its divisors is an integer number (39453183).

Almost surely, 2^669897696 is an apocalyptic number.

It is an amenable number.

669897696 is an abundant number, since it is smaller than the sum of its proper divisors (1223855088).

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

669897696 is a wasteful number, since it uses less digits than its factorization.

669897696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536803 (or 536795 counting only the distinct ones).

The product of its digits is 52907904, while the sum is 66.

The square root of 669897696 is about 25882.3819614811. The cubic root of 669897696 is about 874.9894729618.

The spelling of 669897696 in words is "six hundred sixty-nine million, eight hundred ninety-seven thousand, six hundred ninety-six".