66436135454503 has 16 divisors (see below), whose sum is σ = 66652527063904. Its totient is φ = 66220137308160.

The previous prime is 66436135454477. The next prime is 66436135454543. The reversal of 66436135454503 is 30545453163466.

It is a cyclic number.

It is not a de Polignac number, because 66436135454503 - 2⁴⁵ = 31251763365671 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 (66436135454543) 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, 2071129501 + ... + 2071161577.

It is an arithmetic number, because the mean of its divisors is an integer number (4165782941494).

Almost surely, 2^{66436135454503} is an apocalyptic number.

66436135454503 is a deficient number, since it is larger than the sum of its proper divisors (216391609401).

66436135454503 is a wasteful number, since it uses less digits than its factorization.

66436135454503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38002.

The product of its (nonzero) digits is 46656000, while the sum is 55.

The spelling of 66436135454503 in words is "sixty-six trillion, four hundred thirty-six billion, one hundred thirty-five million, four hundred fifty-four thousand, five hundred three".