100660561551 has 48 divisors (see below), whose sum is σ = 167991576480. Its totient is φ = 57402562560.

The previous prime is 100660561531. The next prime is 100660561571. The reversal of 100660561551 is 155165066001.

It is an interprime number because it is at equal distance from previous prime (100660561531) and next prime (100660561571).

It is not a de Polignac number, because 100660561551 - 2⁷ = 100660561423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100660561501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10384315 + ... + 10394003.

It is an arithmetic number, because the mean of its divisors is an integer number (3499824510).

Almost surely, 2^100660561551 is an apocalyptic number.

100660561551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100660561551 is a deficient number, since it is larger than the sum of its proper divisors (67331014929).

100660561551 is a wasteful number, since it uses less digits than its factorization.

100660561551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15896 (or 15893 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 100660561551 in words is "one hundred billion, six hundred sixty million, five hundred sixty-one thousand, five hundred fifty-one".