66636263040401 has 32 divisors (see below), whose sum is σ = 70724083949568. Its totient is φ = 62673532945920.

The previous prime is 66636263040371. The next prime is 66636263040547. The reversal of 66636263040401 is 10404036263666.

It is a cyclic number.

It is not a de Polignac number, because 66636263040401 - 2³⁸ = 66361385133457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66636263060401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4301048411 + ... + 4301063903.

It is an arithmetic number, because the mean of its divisors is an integer number (2210127623424).

Almost surely, 2^{66636263040401} is an apocalyptic number.

It is an amenable number.

66636263040401 is a deficient number, since it is larger than the sum of its proper divisors (4087820909167).

66636263040401 is a wasteful number, since it uses less digits than its factorization.

66636263040401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19521.

The product of its (nonzero) digits is 2239488, while the sum is 47.

The spelling of 66636263040401 in words is "sixty-six trillion, six hundred thirty-six billion, two hundred sixty-three million, forty thousand, four hundred one".