98661570621 has 8 divisors (see below), whose sum is σ = 131553774240. Its totient is φ = 65771873712.

The previous prime is 98661570589. The next prime is 98661570653. The reversal of 98661570621 is 12607516689.

It is an interprime number because it is at equal distance from previous prime (98661570589) and next prime (98661570653).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 98661570621 - 2⁵ = 98661570589 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98661570221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532831 + ... + 693708.

It is an arithmetic number, because the mean of its divisors is an integer number (16444221780).

Almost surely, 2^98661570621 is an apocalyptic number.

It is an amenable number.

98661570621 is a deficient number, since it is larger than the sum of its proper divisors (32892203619).

98661570621 is a wasteful number, since it uses less digits than its factorization.

98661570621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253355.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 98661570621 in words is "ninety-eight billion, six hundred sixty-one million, five hundred seventy thousand, six hundred twenty-one".