66438101036 has 6 divisors (see below), whose sum is σ = 116266676820. Its totient is φ = 33219050516.

The previous prime is 66438101033. The next prime is 66438101039. The reversal of 66438101036 is 63010183466.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66438101033) and next prime (66438101039).

It is not an unprimeable number, because it can be changed into a prime (66438101033) 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 as a sum of consecutive naturals, namely, 8304762626 + ... + 8304762633.

It is an arithmetic number, because the mean of its divisors is an integer number (19377779470).

Almost surely, 2^66438101036 is an apocalyptic number.

It is an amenable number.

66438101036 is a deficient number, since it is larger than the sum of its proper divisors (49828575784).

66438101036 is a wasteful number, since it uses less digits than its factorization.

66438101036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16609525263 (or 16609525261 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 66438101036 in words is "sixty-six billion, four hundred thirty-eight million, one hundred one thousand, thirty-six".