661096796415 has 32 divisors (see below), whose sum is σ = 1154407997952. Its totient is φ = 320394672000.

The previous prime is 661096796413. The next prime is 661096796417. The reversal of 661096796415 is 514697690166.

It is an interprime number because it is at equal distance from previous prime (661096796413) and next prime (661096796417).

It is not a de Polignac number, because 661096796415 - 2¹ = 661096796413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661096796411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469491 + ... + 1242020.

It is an arithmetic number, because the mean of its divisors is an integer number (36075249936).

Almost surely, 2^661096796415 is an apocalyptic number.

661096796415 is a deficient number, since it is larger than the sum of its proper divisors (493311201537).

661096796415 is a wasteful number, since it uses less digits than its factorization.

661096796415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713871.

The product of its (nonzero) digits is 14696640, while the sum is 60.

The spelling of 661096796415 in words is "six hundred sixty-one billion, ninety-six million, seven hundred ninety-six thousand, four hundred fifteen".