661114985 has 16 divisors (see below), whose sum is σ = 801239040. Its totient is φ = 523652160.

The previous prime is 661114973. The next prime is 661114999. The reversal of 661114985 is 589411166.

It is not a de Polignac number, because 661114985 - 2¹² = 661110889 is a prime.

It is a Curzon number.

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, 217184 + ... + 220206.

It is an arithmetic number, because the mean of its divisors is an integer number (50077440).

Almost surely, 2^661114985 is an apocalyptic number.

It is an amenable number.

661114985 is a deficient number, since it is larger than the sum of its proper divisors (140124055).

661114985 is a wasteful number, since it uses less digits than its factorization.

661114985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3448.

The product of its digits is 51840, while the sum is 41.

The square root of 661114985 is about 25712.1563662016. The cubic root of 661114985 is about 871.1487819031.

The spelling of 661114985 in words is "six hundred sixty-one million, one hundred fourteen thousand, nine hundred eighty-five".