1660774065461 has 16 divisors (see below), whose sum is σ = 1960998203136. Its totient is φ = 1376753366016.

The previous prime is 1660774065451. The next prime is 1660774065487. The reversal of 1660774065461 is 1645604770661.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1660774065461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660774065421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19155116 + ... + 19241621.

It is an arithmetic number, because the mean of its divisors is an integer number (122562387696).

Almost surely, 2^{1660774065461} is an apocalyptic number.

It is an amenable number.

1660774065461 is a deficient number, since it is larger than the sum of its proper divisors (300224137675).

1660774065461 is a wasteful number, since it uses less digits than its factorization.

1660774065461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38396948.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 1660774065461 in words is "one trillion, six hundred sixty billion, seven hundred seventy-four million, sixty-five thousand, four hundred sixty-one".