661254660555114 has 32 divisors (see below), whose sum is σ = 1327062353843520. Its totient is φ = 219659426010752.

The previous prime is 661254660555091. The next prime is 661254660555131. The reversal of 661254660555114 is 411555066452166.

It is a super-2 number, since 2×661254660555114² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53908102 + ... + 65027630.

It is an arithmetic number, because the mean of its divisors is an integer number (41470698557610).

Almost surely, 2^{661254660555114} is an apocalyptic number.

661254660555114 is an abundant number, since it is smaller than the sum of its proper divisors (665807693288406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661254660555114 is a wasteful number, since it uses less digits than its factorization.

661254660555114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11153654.

The product of its (nonzero) digits is 25920000, while the sum is 57.

The spelling of 661254660555114 in words is "six hundred sixty-one trillion, two hundred fifty-four billion, six hundred sixty million, five hundred fifty-five thousand, one hundred fourteen".