1655556667 has 6 divisors (see below), whose sum is σ = 1680639828. Its totient is φ = 1630842444.

The previous prime is 1655556641. The next prime is 1655556709. The reversal of 1655556667 is 7666555561.

It is not a de Polignac number, because 1655556667 - 2¹¹ = 1655554619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1655556167) 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 5 ways as a sum of consecutive naturals, for example, 179913 + ... + 188890.

It is an arithmetic number, because the mean of its divisors is an integer number (280106638).

Almost surely, 2^1655556667 is an apocalyptic number.

1655556667 is a deficient number, since it is larger than the sum of its proper divisors (25083161).

1655556667 is an frugal number, since it uses more digits than its factorization.

1655556667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368937 (or 368870 counting only the distinct ones).

The product of its digits is 5670000, while the sum is 52.

The square root of 1655556667 is about 40688.5323770716. The cubic root of 1655556667 is about 1182.9907536957.

The spelling of 1655556667 in words is "one billion, six hundred fifty-five million, five hundred fifty-six thousand, six hundred sixty-seven".