671331641751025 has 6 divisors (see below), whose sum is σ = 832451235771302. Its totient is φ = 537065313400800.

The previous prime is 671331641750933. The next prime is 671331641751073. The reversal of 671331641751025 is 520157146133176.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 30391482045409 + 640940159705616 = 5512847^2 + 25316796^2 .

It is a de Polignac number, because none of the positive numbers 2^k-671331641751025 is a prime.

It is a super-2 number, since 2×671331641751025² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13426632834996 + ... + 13426632835045.

Almost surely, 2^{671331641751025} is an apocalyptic number.

It is an amenable number.

671331641751025 is a deficient number, since it is larger than the sum of its proper divisors (161119594020277).

671331641751025 is a wasteful number, since it uses less digits than its factorization.

671331641751025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26853265670051 (or 26853265670046 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 671331641751025 in words is "six hundred seventy-one trillion, three hundred thirty-one billion, six hundred forty-one million, seven hundred fifty-one thousand, twenty-five".