101660633551 has 4 divisors (see below), whose sum is σ = 101684608704. Its totient is φ = 101636658400.

The previous prime is 101660633549. The next prime is 101660633561. The reversal of 101660633551 is 155336066101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 101660633551 - 2¹ = 101660633549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101660633551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101660633531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11981215 + ... + 11989696.

It is an arithmetic number, because the mean of its divisors is an integer number (25421152176).

Almost surely, 2^101660633551 is an apocalyptic number.

101660633551 is a deficient number, since it is larger than the sum of its proper divisors (23975153).

101660633551 is an equidigital number, since it uses as much as digits as its factorization.

101660633551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23975152.

The product of its (nonzero) digits is 48600, while the sum is 37.

Adding to 101660633551 its reverse (155336066101), we get a palindrome (256996699652).

The spelling of 101660633551 in words is "one hundred one billion, six hundred sixty million, six hundred thirty-three thousand, five hundred fifty-one".