661410076 has 48 divisors (see below), whose sum is σ = 1247178240. Its totient is φ = 306270720.

The previous prime is 661410067. The next prime is 661410091. The reversal of 661410076 is 670014166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312261 + ... + 314371.

It is an arithmetic number, because the mean of its divisors is an integer number (25982880).

Almost surely, 2^661410076 is an apocalyptic number.

It is an amenable number.

661410076 is a deficient number, since it is larger than the sum of its proper divisors (585768164).

661410076 is a wasteful number, since it uses less digits than its factorization.

661410076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2254 (or 2252 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 661410076 is about 25717.8940817478. The cubic root of 661410076 is about 871.2783760648.

The spelling of 661410076 in words is "six hundred sixty-one million, four hundred ten thousand, seventy-six".