669453765750 has 1152 divisors, whose sum is σ = 2377023667200. Its totient is φ = 135750384000.

The previous prime is 669453765601. The next prime is 669453765767. The reversal of 669453765750 is 57567354966.

669453765750 is a `hidden beast` number, since 6 + 6 + 9 + 4 + 53 + 7 + 6 + 575 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 6256577197 + ... + 6256577303.

It is an arithmetic number, because the mean of its divisors is an integer number (2063388600).

Almost surely, 2^669453765750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669453765750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1188511833600).

669453765750 is an abundant number, since it is smaller than the sum of its proper divisors (1707569901450).

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

669453765750 is a wasteful number, since it uses less digits than its factorization.

669453765750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 142884000, while the sum is 63.

The spelling of 669453765750 in words is "six hundred sixty-nine billion, four hundred fifty-three million, seven hundred sixty-five thousand, seven hundred fifty".