19660755379 has 8 divisors (see below), whose sum is σ = 20684619648. Its totient is φ = 18662811840.

The previous prime is 19660755329. The next prime is 19660755403. The reversal of 19660755379 is 97355706691.

It is a happy number.

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

It is not a de Polignac number, because 19660755379 - 2⁷ = 19660755251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19660755329) 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, 6478627 + ... + 6481660.

It is an arithmetic number, because the mean of its divisors is an integer number (2585577456).

Almost surely, 2^19660755379 is an apocalyptic number.

19660755379 is a deficient number, since it is larger than the sum of its proper divisors (1023864269).

19660755379 is a wasteful number, since it uses less digits than its factorization.

19660755379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12960365.

The product of its (nonzero) digits is 10716300, while the sum is 58.

The spelling of 19660755379 in words is "nineteen billion, six hundred sixty million, seven hundred fifty-five thousand, three hundred seventy-nine".