66551255514 has 48 divisors (see below), whose sum is σ = 152476257024. Its totient is φ = 20944526400.

The previous prime is 66551255513. The next prime is 66551255539. The reversal of 66551255514 is 41555215566.

It is a happy number.

66551255514 is a `hidden beast` number, since 6 + 6 + 5 + 5 + 125 + 5 + 514 = 666.

It is a super-2 number, since 2×66551255514² (a number of 22 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 66551255514.

It is not an unprimeable number, because it can be changed into a prime (66551255513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1431604 + ... + 1477359.

It is an arithmetic number, because the mean of its divisors is an integer number (3176588688).

Almost surely, 2^66551255514 is an apocalyptic number.

66551255514 is an abundant number, since it is smaller than the sum of its proper divisors (85925001510).

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

66551255514 is a wasteful number, since it uses less digits than its factorization.

66551255514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909043 (or 2909040 counting only the distinct ones).

The product of its digits is 900000, while the sum is 45.

The spelling of 66551255514 in words is "sixty-six billion, five hundred fifty-one million, two hundred fifty-five thousand, five hundred fourteen".