681752466 has 48 divisors (see below), whose sum is σ = 1493462880. Its totient is φ = 224752320.

The previous prime is 681752441. The next prime is 681752473. The reversal of 681752466 is 664257186.

681752466 is a `hidden beast` number, since 68 + 1 + 7 + 524 + 66 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1303281 + ... + 1303803.

It is an arithmetic number, because the mean of its divisors is an integer number (31113810).

Almost surely, 2^681752466 is an apocalyptic number.

681752466 is an abundant number, since it is smaller than the sum of its proper divisors (811710414).

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

681752466 is a wasteful number, since it uses less digits than its factorization.

681752466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191 (or 1188 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 681752466 is about 26110.3900009173. The cubic root of 681752466 is about 880.1207074435.

The spelling of 681752466 in words is "six hundred eighty-one million, seven hundred fifty-two thousand, four hundred sixty-six".