668892547960 has 256 divisors, whose sum is σ = 1864883865600. Its totient is φ = 210262874112.

The previous prime is 668892547937. The next prime is 668892547987. The reversal of 668892547960 is 69745298866.

It is a Harshad number since it is a multiple of its sum of digits (70).

It is a self number, because there is not a number n which added to its sum of digits gives 668892547960.

It is a congruent number.

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, 382879807 + ... + 382881553.

It is an arithmetic number, because the mean of its divisors is an integer number (7284702600).

Almost surely, 2^668892547960 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668892547960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (932441932800).

668892547960 is an abundant number, since it is smaller than the sum of its proper divisors (1195991317640).

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

668892547960 is a wasteful number, since it uses less digits than its factorization.

668892547960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430 (or 2426 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 70.

The spelling of 668892547960 in words is "six hundred sixty-eight billion, eight hundred ninety-two million, five hundred forty-seven thousand, nine hundred sixty".