10661512403 has 8 divisors (see below), whose sum is σ = 10797173520. Its totient is φ = 10526376960.

The previous prime is 10661512399. The next prime is 10661512451. The reversal of 10661512403 is 30421516601.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10661512403 - 2² = 10661512399 is a prime.

It is a super-2 number, since 2×10661512403² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10661512453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90518 + ... + 171803.

It is an arithmetic number, because the mean of its divisors is an integer number (1349646690).

Almost surely, 2^10661512403 is an apocalyptic number.

10661512403 is a deficient number, since it is larger than the sum of its proper divisors (135661117).

10661512403 is an equidigital number, since it uses as much as digits as its factorization.

10661512403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262837.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 10661512403 in words is "ten billion, six hundred sixty-one million, five hundred twelve thousand, four hundred three".