66401606302611 has 8 divisors (see below), whose sum is σ = 91588422486480. Its totient is φ = 42741263826912.

The previous prime is 66401606302589. The next prime is 66401606302639. The reversal of 66401606302611 is 11620360610466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66401606302611 - 2¹¹ = 66401606300563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66401606302411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381618426940 + ... + 381618427113.

It is an arithmetic number, because the mean of its divisors is an integer number (11448552810810).

Almost surely, 2^{66401606302611} is an apocalyptic number.

66401606302611 is a deficient number, since it is larger than the sum of its proper divisors (25186816183869).

66401606302611 is a wasteful number, since it uses less digits than its factorization.

66401606302611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763236854085.

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 66401606302611 in words is "sixty-six trillion, four hundred one billion, six hundred six million, three hundred two thousand, six hundred eleven".