661096016 has 40 divisors (see below), whose sum is σ = 1482405120. Its totient is φ = 279736704.

The previous prime is 661095973. The next prime is 661096063. The reversal of 661096016 is 610690166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28511 + ... + 46206.

It is an arithmetic number, because the mean of its divisors is an integer number (37060128).

Almost surely, 2^661096016 is an apocalyptic number.

It is an amenable number.

661096016 is an abundant number, since it is smaller than the sum of its proper divisors (821309104).

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

661096016 is a wasteful number, since it uses less digits than its factorization.

661096016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74811 (or 74805 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 661096016 is about 25711.7874913433. The cubic root of 661096016 is about 871.1404500296.

The spelling of 661096016 in words is "six hundred sixty-one million, ninety-six thousand, sixteen".