669769794069516 has 36 divisors (see below), whose sum is σ = 1934890516201552. Its totient is φ = 191362798305504.

The previous prime is 669769794069491. The next prime is 669769794069547. The reversal of 669769794069516 is 615960497967966.

It is a happy number.

669769794069516 is a `hidden beast` number, since 6 + 6 + 97 + 69 + 7 + 9 + 406 + 9 + 51 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1328908321315 + ... + 1328908321818.

Almost surely, 2^{669769794069516} is an apocalyptic number.

It is an amenable number.

669769794069516 is an abundant number, since it is smaller than the sum of its proper divisors (1265120722132036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669769794069516 is a wasteful number, since it uses less digits than its factorization.

669769794069516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657816643150 (or 2657816643145 counting only the distinct ones).

The product of its (nonzero) digits is 49997969280, while the sum is 90.

The spelling of 669769794069516 in words is "six hundred sixty-nine trillion, seven hundred sixty-nine billion, seven hundred ninety-four million, sixty-nine thousand, five hundred sixteen".