66061501555150 has 48 divisors (see below), whose sum is σ = 128251168257024. Its totient is φ = 25268921520480.

The previous prime is 66061501555141. The next prime is 66061501555151. The reversal of 66061501555150 is 5155510516066.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 66061501555150.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66061501555151) 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, 3420522 + ... + 11992621.

It is an arithmetic number, because the mean of its divisors is an integer number (2671899338688).

Almost surely, 2^{66061501555150} is an apocalyptic number.

66061501555150 is a deficient number, since it is larger than the sum of its proper divisors (62189666701874).

66061501555150 is a wasteful number, since it uses less digits than its factorization.

66061501555150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15416905 (or 15416900 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 66061501555150 in words is "sixty-six trillion, sixty-one billion, five hundred one million, five hundred fifty-five thousand, one hundred fifty".