10661424975 has 18 divisors (see below), whose sum is σ = 19095797136. Its totient is φ = 5686093200.

The previous prime is 10661424973. The next prime is 10661424997. The reversal of 10661424975 is 57942416601.

10661424975 is a `hidden beast` number, since 1 + 0 + 6 + 614 + 24 + 9 + 7 + 5 = 666.

It is not a de Polignac number, because 10661424975 - 2¹ = 10661424973 is a prime.

It is a super-2 number, since 2×10661424975² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 10661424975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10661424971) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23691831 + ... + 23692280.

Almost surely, 2^10661424975 is an apocalyptic number.

10661424975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10661424975 is a deficient number, since it is larger than the sum of its proper divisors (8434372161).

10661424975 is a wasteful number, since it uses less digits than its factorization.

10661424975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47384127 (or 47384119 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 10661424975 in words is "ten billion, six hundred sixty-one million, four hundred twenty-four thousand, nine hundred seventy-five".