669490900798 has 16 divisors (see below), whose sum is σ = 1063937231280. Its totient is φ = 314868422016.

The previous prime is 669490900789. The next prime is 669490900823. The reversal of 669490900798 is 897009094966.

It is a congruent number.

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, 5757828 + ... + 5872951.

It is an arithmetic number, because the mean of its divisors is an integer number (66496076955).

Almost surely, 2^669490900798 is an apocalyptic number.

669490900798 is a deficient number, since it is larger than the sum of its proper divisors (394446330482).

669490900798 is a wasteful number, since it uses less digits than its factorization.

669490900798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11632491.

The product of its (nonzero) digits is 52907904, while the sum is 67.

The spelling of 669490900798 in words is "six hundred sixty-nine billion, four hundred ninety million, nine hundred thousand, seven hundred ninety-eight".