669276549 has 6 divisors (see below), whose sum is σ = 966732806. Its totient is φ = 446184360.

The previous prime is 669276499. The next prime is 669276551. The reversal of 669276549 is 945672966.

669276549 is a `hidden beast` number, since 6 + 6 + 92 + 7 + 6 + 549 = 666.

669276549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 607967649 + 61308900 = 24657^2 + 7830^2 .

It is not a de Polignac number, because 669276549 - 2¹² = 669272453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 669276495 and 669276504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669276599) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37182022 + ... + 37182039.

Almost surely, 2^669276549 is an apocalyptic number.

It is an amenable number.

669276549 is a deficient number, since it is larger than the sum of its proper divisors (297456257).

669276549 is a wasteful number, since it uses less digits than its factorization.

669276549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74364067 (or 74364064 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 669276549 is about 25870.3797614183. The cubic root of 669276549 is about 874.7189514789.

The spelling of 669276549 in words is "six hundred sixty-nine million, two hundred seventy-six thousand, five hundred forty-nine".