669611559 has 8 divisors (see below), whose sum is σ = 893047680. Its totient is φ = 446291576.

The previous prime is 669611543. The next prime is 669611567. The reversal of 669611559 is 955116966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 669611559 - 2⁴ = 669611543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669615559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14547 + ... + 39380.

It is an arithmetic number, because the mean of its divisors is an integer number (111630960).

Almost surely, 2^669611559 is an apocalyptic number.

669611559 is a deficient number, since it is larger than the sum of its proper divisors (223436121).

669611559 is a wasteful number, since it uses less digits than its factorization.

669611559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58069.

The product of its digits is 437400, while the sum is 48.

The square root of 669611559 is about 25876.8537306992. The cubic root of 669611559 is about 874.8648755695.

The spelling of 669611559 in words is "six hundred sixty-nine million, six hundred eleven thousand, five hundred fifty-nine".