66451142415 has 64 divisors (see below), whose sum is σ = 129742626816. Its totient is φ = 28381110912.

The previous prime is 66451142383. The next prime is 66451142437. The reversal of 66451142415 is 51424115466.

It is not a de Polignac number, because 66451142415 - 2⁵ = 66451142383 is a prime.

It is a super-2 number, since 2×66451142415² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 216109 + ... + 423798.

It is an arithmetic number, because the mean of its divisors is an integer number (2027228544).

Almost surely, 2^66451142415 is an apocalyptic number.

66451142415 is a deficient number, since it is larger than the sum of its proper divisors (63291484401).

66451142415 is a wasteful number, since it uses less digits than its factorization.

66451142415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639988.

The product of its digits is 115200, while the sum is 39.

The spelling of 66451142415 in words is "sixty-six billion, four hundred fifty-one million, one hundred forty-two thousand, four hundred fifteen".