10661515011 has 36 divisors (see below), whose sum is σ = 18857116200. Its totient is φ = 5771642688.

The previous prime is 10661514923. The next prime is 10661515019. The reversal of 10661515011 is 11051516601.

10661515011 is a `hidden beast` number, since 1 + 0 + 6 + 6 + 151 + 501 + 1 = 666.

It is not a de Polignac number, because 10661515011 - 2⁷ = 10661514883 is a prime.

It is a super-2 number, since 2×10661515011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10661515019) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 627826 + ... + 644583.

Almost surely, 2^10661515011 is an apocalyptic number.

10661515011 is a deficient number, since it is larger than the sum of its proper divisors (8195601189).

10661515011 is a wasteful number, since it uses less digits than its factorization.

10661515011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272448 (or 1272438 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The spelling of 10661515011 in words is "ten billion, six hundred sixty-one million, five hundred fifteen thousand, eleven".