669017727 has 48 divisors (see below), whose sum is σ = 1163468800. Its totient is φ = 369910800.

The previous prime is 669017707. The next prime is 669017729. The reversal of 669017727 is 727710966.

It is not a de Polignac number, because 669017727 - 2⁸ = 669017471 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 (669017729) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92202 + ... + 99192.

Almost surely, 2^669017727 is an apocalyptic number.

669017727 is a deficient number, since it is larger than the sum of its proper divisors (494451073).

669017727 is a wasteful number, since it uses less digits than its factorization.

669017727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7049 (or 7032 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The square root of 669017727 is about 25865.3769931930. The cubic root of 669017727 is about 874.6061801095.

The spelling of 669017727 in words is "six hundred sixty-nine million, seventeen thousand, seven hundred twenty-seven".