661150716 has 12 divisors (see below), whose sum is σ = 1542685032. Its totient is φ = 220383568.

The previous prime is 661150687. The next prime is 661150741. The reversal of 661150716 is 617051166.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27547935 + ... + 27547958.

It is an arithmetic number, because the mean of its divisors is an integer number (128557086).

Almost surely, 2^661150716 is an apocalyptic number.

It is an amenable number.

661150716 is an abundant number, since it is smaller than the sum of its proper divisors (881534316).

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

661150716 is a wasteful number, since it uses less digits than its factorization.

661150716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55095900 (or 55095898 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 661150716 is about 25712.8511837952. The cubic root of 661150716 is about 871.1644758227.

The spelling of 661150716 in words is "six hundred sixty-one million, one hundred fifty thousand, seven hundred sixteen".