1001667663 has 12 divisors (see below), whose sum is σ = 1485957928. Its totient is φ = 649730160.

The previous prime is 1001667637. The next prime is 1001667683. The reversal of 1001667663 is 3667661001.

It is not a de Polignac number, because 1001667663 - 2²⁵ = 968113231 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 (1001667613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1503673 + ... + 1504338.

Almost surely, 2^1001667663 is an apocalyptic number.

1001667663 is a deficient number, since it is larger than the sum of its proper divisors (484290265).

1001667663 is a wasteful number, since it uses less digits than its factorization.

1001667663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3008054 (or 3008051 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 1001667663 is about 31649.1336848262. The cubic root of 1001667663 is about 1000.5555789415. Note that the first 4 decimals are identical.

The spelling of 1001667663 in words is "one billion, one million, six hundred sixty-seven thousand, six hundred sixty-three".