669178838086 has 16 divisors (see below), whose sum is σ = 1095105786768. Its totient is φ = 304148346400.

The previous prime is 669178838039. The next prime is 669178838087. The reversal of 669178838086 is 680838871966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669178838087) 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, 904165 + ... + 1468288.

It is an arithmetic number, because the mean of its divisors is an integer number (68444111673).

Almost surely, 2^669178838086 is an apocalyptic number.

669178838086 is a deficient number, since it is larger than the sum of its proper divisors (425926948682).

669178838086 is a wasteful number, since it uses less digits than its factorization.

669178838086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385287.

The product of its (nonzero) digits is 167215104, while the sum is 70.

The spelling of 669178838086 in words is "six hundred sixty-nine billion, one hundred seventy-eight million, eight hundred thirty-eight thousand, eighty-six".