505666001667 has 16 divisors (see below), whose sum is σ = 678418248960. Its totient is φ = 335012581152.

The previous prime is 505666001629. The next prime is 505666001669. The reversal of 505666001667 is 766100666505.

It is a happy number.

It is not a de Polignac number, because 505666001667 - 2³⁵ = 471306263299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505666001669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6335434 + ... + 6414752.

It is an arithmetic number, because the mean of its divisors is an integer number (42401140560).

Almost surely, 2^505666001667 is an apocalyptic number.

505666001667 is a deficient number, since it is larger than the sum of its proper divisors (172752247293).

505666001667 is a wasteful number, since it uses less digits than its factorization.

505666001667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92522.

The product of its (nonzero) digits is 1360800, while the sum is 48.

The spelling of 505666001667 in words is "five hundred five billion, six hundred sixty-six million, one thousand, six hundred sixty-seven".