1667860663 has 16 divisors (see below), whose sum is σ = 1990273536. Its totient is φ = 1366564320.

The previous prime is 1667860661. The next prime is 1667860669. The reversal of 1667860663 is 3660687661.

It is not a de Polignac number, because 1667860663 - 2¹ = 1667860661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667860661) 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, 405445 + ... + 409537.

It is an arithmetic number, because the mean of its divisors is an integer number (124392096).

Almost surely, 2^1667860663 is an apocalyptic number.

1667860663 is a deficient number, since it is larger than the sum of its proper divisors (322412873).

1667860663 is a wasteful number, since it uses less digits than its factorization.

1667860663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6654.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 1667860663 is about 40839.4498371366. The cubic root of 1667860663 is about 1185.9141617504.

The spelling of 1667860663 in words is "one billion, six hundred sixty-seven million, eight hundred sixty thousand, six hundred sixty-three".