669277056 has 64 divisors (see below), whose sum is σ = 2031742080. Its totient is φ = 191221248.

The previous prime is 669277043. The next prime is 669277079. The reversal of 669277056 is 650772966.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 669276996 and 669277014.

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, 121806 + ... + 127181.

It is an arithmetic number, because the mean of its divisors is an integer number (31745970).

Almost surely, 2^669277056 is an apocalyptic number.

It is an amenable number.

669277056 is an abundant number, since it is smaller than the sum of its proper divisors (1362465024).

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

669277056 is a wasteful number, since it uses less digits than its factorization.

669277056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249011 (or 248999 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 48.

The square root of 669277056 is about 25870.3895602675. The cubic root of 669277056 is about 874.7191723554.

The spelling of 669277056 in words is "six hundred sixty-nine million, two hundred seventy-seven thousand, fifty-six".