66411344455250 has 32 divisors (see below), whose sum is σ = 124322678271792. Its totient is φ = 26564400720000.

The previous prime is 66411344455219. The next prime is 66411344455349. The reversal of 66411344455250 is 5255444311466.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4801388116849 + 61609956338401 = 2191207^2 + 7849201^2 .

It is a super-3 number, since 3×66411344455250³ (a number of 42 digits) contains 333 as substring.

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

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, 57841760 + ... + 58978740.

Almost surely, 2^{66411344455250} is an apocalyptic number.

66411344455250 is a deficient number, since it is larger than the sum of its proper divisors (57911333816542).

66411344455250 is a wasteful number, since it uses less digits than its factorization.

66411344455250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370639 (or 1370629 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 50.

The spelling of 66411344455250 in words is "sixty-six trillion, four hundred eleven billion, three hundred forty-four million, four hundred fifty-five thousand, two hundred fifty".