661000014 has 40 divisors (see below), whose sum is σ = 1485236280. Its totient is φ = 219722544.

The previous prime is 661000009. The next prime is 661000019. The reversal of 661000014 is 410000166.

661000014 is a `hidden beast` number, since 661 + 0 + 0 + 0 + 0 + 1 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (661000009) and next prime (661000019).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661000019) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 54957 + ... + 65895.

It is an arithmetic number, because the mean of its divisors is an integer number (37130907).

Almost surely, 2^661000014 is an apocalyptic number.

661000014 is an abundant number, since it is smaller than the sum of its proper divisors (824236266).

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

661000014 is a wasteful number, since it uses less digits than its factorization.

661000014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11326 (or 11317 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 661000014 is about 25709.9205366333. The cubic root of 661000014 is about 871.0982800210.

The spelling of 661000014 in words is "six hundred sixty-one million, fourteen", and thus it is an aban number.