669984379135 has 16 divisors (see below), whose sum is σ = 812927094336. Its totient is φ = 530032555008.

The previous prime is 669984379133. The next prime is 669984379187. The reversal of 669984379135 is 531973489966.

It is a cyclic number.

It is not a de Polignac number, because 669984379135 - 2¹ = 669984379133 is a prime.

It is a super-2 number, since 2×669984379135² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669984379133) 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, 41574 + ... + 1158316.

It is an arithmetic number, because the mean of its divisors is an integer number (50807943396).

Almost surely, 2^669984379135 is an apocalyptic number.

669984379135 is a deficient number, since it is larger than the sum of its proper divisors (142942715201).

669984379135 is a wasteful number, since it uses less digits than its factorization.

669984379135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118082.

The product of its digits is 264539520, while the sum is 70.

The spelling of 669984379135 in words is "six hundred sixty-nine billion, nine hundred eighty-four million, three hundred seventy-nine thousand, one hundred thirty-five".