66436334521451 has 8 divisors (see below), whose sum is σ = 66484118123280. Its totient is φ = 66388552729632.

The previous prime is 66436334521439. The next prime is 66436334521471. The reversal of 66436334521451 is 15412543363466.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66436334521451 - 2³⁰ = 66435260779627 is a prime.

It is a super-2 number, since 2×66436334521451² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66436334521393 and 66436334521402.

It is not an unprimeable number, because it can be changed into a prime (66436334521471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77846216 + ... + 78695018.

It is an arithmetic number, because the mean of its divisors is an integer number (8310514765410).

Almost surely, 2^{66436334521451} is an apocalyptic number.

66436334521451 is a deficient number, since it is larger than the sum of its proper divisors (47783601829).

66436334521451 is a wasteful number, since it uses less digits than its factorization.

66436334521451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905005.

The product of its digits is 18662400, while the sum is 53.

The spelling of 66436334521451 in words is "sixty-six trillion, four hundred thirty-six billion, three hundred thirty-four million, five hundred twenty-one thousand, four hundred fifty-one".