669434225477 has 4 divisors (see below), whose sum is σ = 669436855980. Its totient is φ = 669431594976.

The previous prime is 669434225459. The next prime is 669434225489. The reversal of 669434225477 is 774522434966.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 463072084036 + 206362141441 = 680494^2 + 454271^2 .

It is a cyclic number.

It is not a de Polignac number, because 669434225477 - 2⁶ = 669434225413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669434225077) 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, 887048 + ... + 1457985.

It is an arithmetic number, because the mean of its divisors is an integer number (167359213995).

Almost surely, 2^669434225477 is an apocalyptic number.

It is an amenable number.

669434225477 is a deficient number, since it is larger than the sum of its proper divisors (2630503).

669434225477 is a wasteful number, since it uses less digits than its factorization.

669434225477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630502.

The product of its digits is 60963840, while the sum is 59.

The spelling of 669434225477 in words is "six hundred sixty-nine billion, four hundred thirty-four million, two hundred twenty-five thousand, four hundred seventy-seven".