642684001466 has 24 divisors (see below), whose sum is σ = 1046894652864. Its totient is φ = 295768508880.

The previous prime is 642684001457. The next prime is 642684001481. The reversal of 642684001466 is 664100486246.

It is a self number, because there is not a number n which added to its sum of digits gives 642684001466.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2622530 + ... + 2857101.

It is an arithmetic number, because the mean of its divisors is an integer number (43620610536).

Almost surely, 2^642684001466 is an apocalyptic number.

642684001466 is a deficient number, since it is larger than the sum of its proper divisors (404210651398).

642684001466 is a wasteful number, since it uses less digits than its factorization.

642684001466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5480006 (or 5479993 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 47.

The spelling of 642684001466 in words is "six hundred forty-two billion, six hundred eighty-four million, one thousand, four hundred sixty-six".