10665515651 has 16 divisors (see below), whose sum is σ = 12853820160. Its totient is φ = 8645110560.

The previous prime is 10665515647. The next prime is 10665515657. The reversal of 10665515651 is 15651556601.

It is a cyclic number.

It is not a de Polignac number, because 10665515651 - 2² = 10665515647 is a prime.

It is a super-2 number, since 2×10665515651² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10665515599 and 10665515608.

It is not an unprimeable number, because it can be changed into a prime (10665515657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2096 + ... + 146066.

It is an arithmetic number, because the mean of its divisors is an integer number (803363760).

Almost surely, 2^10665515651 is an apocalyptic number.

10665515651 is a deficient number, since it is larger than the sum of its proper divisors (2188304509).

10665515651 is a wasteful number, since it uses less digits than its factorization.

10665515651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144554.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 10665515651 in words is "ten billion, six hundred sixty-five million, five hundred fifteen thousand, six hundred fifty-one".