661006016 has 56 divisors (see below), whose sum is σ = 1493178624. Its totient is φ = 287386880.

The previous prime is 661006013. The next prime is 661006033. The reversal of 661006016 is 610600166.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (661006013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4220 + ... + 36603.

It is an arithmetic number, because the mean of its divisors is an integer number (26663904).

Almost surely, 2^661006016 is an apocalyptic number.

It is an amenable number.

661006016 is an abundant number, since it is smaller than the sum of its proper divisors (832172608).

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

661006016 is a wasteful number, since it uses less digits than its factorization.

661006016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40869 (or 40859 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 661006016 is about 25710.0372617388. The cubic root of 661006016 is about 871.1009165898.

The spelling of 661006016 in words is "six hundred sixty-one million, six thousand, sixteen".