66421415514810 has 32 divisors (see below), whose sum is σ = 159411623735232. Its totient is φ = 17712352304000.

The previous prime is 66421415514781. The next prime is 66421415514827. The reversal of 66421415514810 is 1841551412466.

It is a super-2 number, since 2×66421415514810² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66421415514810.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30848617 + ... + 32931443.

It is an arithmetic number, because the mean of its divisors is an integer number (4981613241726).

Almost surely, 2^{66421415514810} is an apocalyptic number.

66421415514810 is an abundant number, since it is smaller than the sum of its proper divisors (92990208220422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66421415514810 is a wasteful number, since it uses less digits than its factorization.

66421415514810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145838.

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 66421415514810 in words is "sixty-six trillion, four hundred twenty-one billion, four hundred fifteen million, five hundred fourteen thousand, eight hundred ten".