671998590900 has 864 divisors, whose sum is σ = 2775443693568. Its totient is φ = 137196633600.

The previous prime is 671998590899. The next prime is 671998590959. The reversal of 671998590900 is 9095899176.

It is a super-3 number, since 3×671998590900³ (a number of 36 digits) contains 333 as substring.

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 287 ways as a sum of consecutive naturals, for example, 68545399 + ... + 68555201.

Almost surely, 2^671998590900 is an apocalyptic number.

671998590900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671998590900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1387721846784).

671998590900 is an abundant number, since it is smaller than the sum of its proper divisors (2103445102668).

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

671998590900 is a wasteful number, since it uses less digits than its factorization.

671998590900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9883 (or 9864 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 63.

The spelling of 671998590900 in words is "six hundred seventy-one billion, nine hundred ninety-eight million, five hundred ninety thousand, nine hundred".