64666004551401 has 24 divisors (see below), whose sum is σ = 94790482859520. Its totient is φ = 39183963961120.

The previous prime is 64666004551381. The next prime is 64666004551433. The reversal of 64666004551401 is 10415540066646.

It is not a de Polignac number, because 64666004551401 - 2¹³ = 64666004543209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64666004551471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15281865 + ... + 19049078.

It is an arithmetic number, because the mean of its divisors is an integer number (3949603452480).

Almost surely, 2^{64666004551401} is an apocalyptic number.

It is an amenable number.

64666004551401 is a deficient number, since it is larger than the sum of its proper divisors (30124478308119).

64666004551401 is a wasteful number, since it uses less digits than its factorization.

64666004551401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34336157 (or 34336146 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 64666004551401 in words is "sixty-four trillion, six hundred sixty-six billion, four million, five hundred fifty-one thousand, four hundred one".