10661554237 has 2 divisors, whose sum is σ = 10661554238. Its totient is φ = 10661554236.

The previous prime is 10661554219. The next prime is 10661554259. The reversal of 10661554237 is 73245516601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7854567876 + 2806986361 = 88626^2 + 52981^2 .

It is a cyclic number.

It is not a de Polignac number, because 10661554237 - 2¹⁹ = 10661029949 is a prime.

It is a super-2 number, since 2×10661554237² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10661554237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10662554237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5330777118 + 5330777119.

It is an arithmetic number, because the mean of its divisors is an integer number (5330777119).

Almost surely, 2^10661554237 is an apocalyptic number.

It is an amenable number.

10661554237 is a deficient number, since it is larger than the sum of its proper divisors (1).

10661554237 is an equidigital number, since it uses as much as digits as its factorization.

10661554237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 10661554237 in words is "ten billion, six hundred sixty-one million, five hundred fifty-four thousand, two hundred thirty-seven".