671340772740 has 96 divisors (see below), whose sum is σ = 2070550250496. Its totient is φ = 161169171840.

The previous prime is 671340772723. The next prime is 671340772741. The reversal of 671340772740 is 47277043176.

It is a self number, because there is not a number n which added to its sum of digits gives 671340772740.

It is not an unprimeable number, because it can be changed into a prime (671340772741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4869802 + ... + 5005761.

It is an arithmetic number, because the mean of its divisors is an integer number (21568231776).

Almost surely, 2^671340772740 is an apocalyptic number.

671340772740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

671340772740 is an abundant number, since it is smaller than the sum of its proper divisors (1399209477756).

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

671340772740 is a wasteful number, since it uses less digits than its factorization.

671340772740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9875689 (or 9875687 counting only the distinct ones).

The product of its (nonzero) digits is 1382976, while the sum is 48.

The spelling of 671340772740 in words is "six hundred seventy-one billion, three hundred forty million, seven hundred seventy-two thousand, seven hundred forty".