669669481007 has 4 divisors (see below), whose sum is σ = 669671138520. Its totient is φ = 669667823496.

The previous prime is 669669480979. The next prime is 669669481037. The reversal of 669669481007 is 700184966966.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 669669481007 - 2¹⁸ = 669669218863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669669481037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217844 + ... + 1177622.

It is an arithmetic number, because the mean of its divisors is an integer number (167417784630).

Almost surely, 2^669669481007 is an apocalyptic number.

669669481007 is a deficient number, since it is larger than the sum of its proper divisors (1657513).

669669481007 is an equidigital number, since it uses as much as digits as its factorization.

669669481007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657512.

The product of its (nonzero) digits is 23514624, while the sum is 62.

The spelling of 669669481007 in words is "six hundred sixty-nine billion, six hundred sixty-nine million, four hundred eighty-one thousand, seven".