665430620000 has 60 divisors (see below), whose sum is σ = 1637059188996. Its totient is φ = 266172240000.

The previous prime is 665430619981. The next prime is 665430620011. The reversal of 665430620000 is 26034566.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16615766 + ... + 16655765.

Almost surely, 2^665430620000 is an apocalyptic number.

It is an amenable number.

665430620000 is an abundant number, since it is smaller than the sum of its proper divisors (971628568996).

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

665430620000 is an equidigital number, since it uses as much as digits as its factorization.

665430620000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33271561 (or 33271538 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 665430620000 its reverse (26034566), we get a palindrome (665456654566).

The spelling of 665430620000 in words is "six hundred sixty-five billion, four hundred thirty million, six hundred twenty thousand".