64661406113411 has 8 divisors (see below), whose sum is σ = 65627952910080. Its totient is φ = 63694901998728.

The previous prime is 64661406113363. The next prime is 64661406113413. The reversal of 64661406113411 is 11431160416646.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64661406113411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64661406113413) 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, 7611431 + ... + 13684176.

It is an arithmetic number, because the mean of its divisors is an integer number (8203494113760).

Almost surely, 2^{64661406113411} is an apocalyptic number.

64661406113411 is a deficient number, since it is larger than the sum of its proper divisors (966546796669).

64661406113411 is a wasteful number, since it uses less digits than its factorization.

64661406113411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21340993.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 64661406113411 in words is "sixty-four trillion, six hundred sixty-one billion, four hundred six million, one hundred thirteen thousand, four hundred eleven".