10340251661 has 4 divisors (see below), whose sum is σ = 10371491424. Its totient is φ = 10309011900.

The previous prime is 10340251643. The next prime is 10340251681. The reversal of 10340251661 is 16615204301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10340251661 - 2²² = 10336057357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10340251681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15619385 + ... + 15620046.

It is an arithmetic number, because the mean of its divisors is an integer number (2592872856).

Almost surely, 2^10340251661 is an apocalyptic number.

It is an amenable number.

10340251661 is a deficient number, since it is larger than the sum of its proper divisors (31239763).

10340251661 is an equidigital number, since it uses as much as digits as its factorization.

10340251661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31239762.

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

Adding to 10340251661 its reverse (16615204301), we get a palindrome (26955455962).

The spelling of 10340251661 in words is "ten billion, three hundred forty million, two hundred fifty-one thousand, six hundred sixty-one".