16634063661 has 16 divisors (see below), whose sum is σ = 23619138624. Its totient is φ = 10376724224.

The previous prime is 16634063653. The next prime is 16634063683. The reversal of 16634063661 is 16636043661.

It is a cyclic number.

It is not a de Polignac number, because 16634063661 - 2³ = 16634063653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16634063161) 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, 933831 + ... + 951476.

It is an arithmetic number, because the mean of its divisors is an integer number (1476196164).

Almost surely, 2^16634063661 is an apocalyptic number.

It is an amenable number.

16634063661 is a deficient number, since it is larger than the sum of its proper divisors (6985074963).

16634063661 is a wasteful number, since it uses less digits than its factorization.

16634063661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885500.

The product of its (nonzero) digits is 279936, while the sum is 42.

The spelling of 16634063661 in words is "sixteen billion, six hundred thirty-four million, sixty-three thousand, six hundred sixty-one".