1217066867379 has 24 divisors (see below), whose sum is σ = 1937573509872. Its totient is φ = 730011985920.

The previous prime is 1217066867369. The next prime is 1217066867383. The reversal of 1217066867379 is 9737686607121.

1217066867379 is a `hidden beast` number, since 12 + 170 + 6 + 6 + 86 + 7 + 379 = 666.

It is not a de Polignac number, because 1217066867379 - 2²⁴ = 1217050090163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1217066867369) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63359494 + ... + 63378699.

It is an arithmetic number, because the mean of its divisors is an integer number (80732229578).

Almost surely, 2^{1217066867379} is an apocalyptic number.

1217066867379 is a deficient number, since it is larger than the sum of its proper divisors (720506642493).

1217066867379 is a wasteful number, since it uses less digits than its factorization.

1217066867379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126738307 (or 126738304 counting only the distinct ones).

The product of its (nonzero) digits is 32006016, while the sum is 63.

The spelling of 1217066867379 in words is "one trillion, two hundred seventeen billion, sixty-six million, eight hundred sixty-seven thousand, three hundred seventy-nine".