667769379 has 16 divisors (see below), whose sum is σ = 908897184. Its totient is φ = 435974400.

The previous prime is 667769339. The next prime is 667769407. The reversal of 667769379 is 973967766.

It is not a de Polignac number, because 667769379 - 2¹³ = 667761187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667769339) 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, 34809 + ... + 50469.

It is an arithmetic number, because the mean of its divisors is an integer number (56806074).

Almost surely, 2^667769379 is an apocalyptic number.

667769379 is a deficient number, since it is larger than the sum of its proper divisors (241127805).

667769379 is a wasteful number, since it uses less digits than its factorization.

667769379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15958.

The product of its digits is 18003384, while the sum is 60.

The square root of 667769379 is about 25841.2340843080. The cubic root of 667769379 is about 874.0618533935.

The spelling of 667769379 in words is "six hundred sixty-seven million, seven hundred sixty-nine thousand, three hundred seventy-nine".