10661061501 has 12 divisors (see below), whose sum is σ = 15535589628. Its totient is φ = 7044476544.

The previous prime is 10661061497. The next prime is 10661061517. The reversal of 10661061501 is 10516016601.

It can be written as a sum of positive squares in 2 ways, for example, as 1007999001 + 9653062500 = 31749^2 + 98250^2 .

It is not a de Polignac number, because 10661061501 - 2² = 10661061497 is a prime.

It is a super-2 number, since 2×10661061501² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10661061001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5240410 + ... + 5242443.

It is an arithmetic number, because the mean of its divisors is an integer number (1294632469).

Almost surely, 2^10661061501 is an apocalyptic number.

It is an amenable number.

10661061501 is a deficient number, since it is larger than the sum of its proper divisors (4874528127).

10661061501 is a wasteful number, since it uses less digits than its factorization.

10661061501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10482972 (or 10482969 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The spelling of 10661061501 in words is "ten billion, six hundred sixty-one million, sixty-one thousand, five hundred one".