64544201066 has 16 divisors (see below), whose sum is σ = 101995709760. Its totient is φ = 30548424960.

The previous prime is 64544201063. The next prime is 64544201069. The reversal of 64544201066 is 66010244546.

It is an interprime number because it is at equal distance from previous prime (64544201063) and next prime (64544201069).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (64544201063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 651590 + ... + 744081.

It is an arithmetic number, because the mean of its divisors is an integer number (6374731860).

Almost surely, 2^64544201066 is an apocalyptic number.

64544201066 is a deficient number, since it is larger than the sum of its proper divisors (37451508694).

64544201066 is a wasteful number, since it uses less digits than its factorization.

64544201066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396909.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 64544201066 in words is "sixty-four billion, five hundred forty-four million, two hundred one thousand, sixty-six".