66516261144350 has 48 divisors (see below), whose sum is σ = 123768419647488. Its totient is φ = 26596146255840.

The previous prime is 66516261144337. The next prime is 66516261144367. The reversal of 66516261144350 is 5344116261566.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2430514367 + ... + 2430541733.

It is an arithmetic number, because the mean of its divisors is an integer number (2578508742656).

Almost surely, 2^{66516261144350} is an apocalyptic number.

66516261144350 is a deficient number, since it is larger than the sum of its proper divisors (57252158503138).

66516261144350 is a wasteful number, since it uses less digits than its factorization.

66516261144350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44529 (or 44524 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 66516261144350 in words is "sixty-six trillion, five hundred sixteen billion, two hundred sixty-one million, one hundred forty-four thousand, three hundred fifty".