1966616209015 has 16 divisors (see below), whose sum is σ = 2442009487680. Its totient is φ = 1518610401280.

The previous prime is 1966616209007. The next prime is 1966616209079. The reversal of 1966616209015 is 5109026166691.

It is a happy number.

It is not a de Polignac number, because 1966616209015 - 2³ = 1966616209007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1411306 + ... + 2434135.

It is an arithmetic number, because the mean of its divisors is an integer number (152625592980).

Almost surely, 2^{1966616209015} is an apocalyptic number.

1966616209015 is a deficient number, since it is larger than the sum of its proper divisors (475393278665).

1966616209015 is a wasteful number, since it uses less digits than its factorization.

1966616209015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849002.

The product of its (nonzero) digits is 1049760, while the sum is 52.

The spelling of 1966616209015 in words is "one trillion, nine hundred sixty-six billion, six hundred sixteen million, two hundred nine thousand, fifteen".