661051076 has 12 divisors (see below), whose sum is σ = 1322102208. Its totient is φ = 283307592.

The previous prime is 661051051. The next prime is 661051081. The reversal of 661051076 is 670150166.

661051076 is an admirable 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, 11804456 + ... + 11804511.

It is an arithmetic number, because the mean of its divisors is an integer number (110175184).

Almost surely, 2^661051076 is an apocalyptic number.

It is an amenable number.

661051076 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

661051076 is a wasteful number, since it uses less digits than its factorization.

661051076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23608978 (or 23608976 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 661051076 is about 25710.9135582538. The cubic root of 661051076 is about 871.1207101138.

The spelling of 661051076 in words is "six hundred sixty-one million, fifty-one thousand, seventy-six".