666762165216000 has 576 divisors, whose sum is σ = 2812254669020160. Its totient is φ = 152402779238400.

The previous prime is 666762165215989. The next prime is 666762165216013. The reversal of 666762165216000 is 612561267666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 49074534 + ... + 61170533.

It is an arithmetic number, because the mean of its divisors is an integer number (4882386578160).

Almost surely, 2^{666762165216000} is an apocalyptic number.

666762165216000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666762165216000 is an abundant number, since it is smaller than the sum of its proper divisors (2145492503804160).

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

666762165216000 is a wasteful number, since it uses less digits than its factorization.

666762165216000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110245114 (or 110245084 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 666762165216000 in words is "six hundred sixty-six trillion, seven hundred sixty-two billion, one hundred sixty-five million, two hundred sixteen thousand".