669613577 has 4 divisors (see below), whose sum is σ = 674048256. Its totient is φ = 665178900.

The previous prime is 669613541. The next prime is 669613583. The reversal of 669613577 is 775316966.

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 not a de Polignac number, because 669613577 - 2¹⁸ = 669351433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669613507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2217113 + ... + 2217414.

It is an arithmetic number, because the mean of its divisors is an integer number (168512064).

Almost surely, 2^669613577 is an apocalyptic number.

It is an amenable number.

669613577 is a deficient number, since it is larger than the sum of its proper divisors (4434679).

669613577 is a wasteful number, since it uses less digits than its factorization.

669613577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434678.

The product of its digits is 1428840, while the sum is 50.

The square root of 669613577 is about 25876.8927230454. The cubic root of 669613577 is about 874.8657544250.

The spelling of 669613577 in words is "six hundred sixty-nine million, six hundred thirteen thousand, five hundred seventy-seven".