10661501050 has 24 divisors (see below), whose sum is σ = 19956714876. Its totient is φ = 4237434240.

The previous prime is 10661501047. The next prime is 10661501069. The reversal of 10661501050 is 5010516601.

It can be written as a sum of positive squares in 6 ways, for example, as 4315307481 + 6346193569 = 65691^2 + 79663^2 .

It is a super-2 number, since 2×10661501050² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 671227 + ... + 686926.

Almost surely, 2^10661501050 is an apocalyptic number.

10661501050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10661501050 is a deficient number, since it is larger than the sum of its proper divisors (9295213826).

10661501050 is a wasteful number, since it uses less digits than its factorization.

10661501050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358322 (or 1358317 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The spelling of 10661501050 in words is "ten billion, six hundred sixty-one million, five hundred one thousand, fifty".