669806911465 has 8 divisors (see below), whose sum is σ = 803786603400. Its totient is φ = 535833322752.

The previous prime is 669806911343. The next prime is 669806911481. The reversal of 669806911465 is 564119608966.

It can be written as a sum of positive squares in 4 ways, for example, as 6872244201 + 662934667264 = 82899^2 + 814208^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 669806911465 - 2⁷ = 669806911337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1280784 + ... + 1726273.

It is an arithmetic number, because the mean of its divisors is an integer number (100473325425).

Almost surely, 2^669806911465 is an apocalyptic number.

It is an amenable number.

669806911465 is a deficient number, since it is larger than the sum of its proper divisors (133979691935).

669806911465 is a wasteful number, since it uses less digits than its factorization.

669806911465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051611.

The product of its (nonzero) digits is 16796160, while the sum is 61.

The spelling of 669806911465 in words is "six hundred sixty-nine billion, eight hundred six million, nine hundred eleven thousand, four hundred sixty-five".