669037694598 has 768 divisors, whose sum is σ = 2046506112000. Its totient is φ = 159993501696.

The previous prime is 669037694569. The next prime is 669037694669. The reversal of 669037694598 is 895496730966.

It is a super-2 number, since 2×669037694598² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 1765270773 + ... + 1765271151.

It is an arithmetic number, because the mean of its divisors is an integer number (2664721500).

Almost surely, 2^669037694598 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669037694598, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1023253056000).

669037694598 is an abundant number, since it is smaller than the sum of its proper divisors (1377468417402).

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

669037694598 is a wasteful number, since it uses less digits than its factorization.

669037694598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 529079040, while the sum is 72.

The spelling of 669037694598 in words is "six hundred sixty-nine billion, thirty-seven million, six hundred ninety-four thousand, five hundred ninety-eight".