687072066 has 16 divisors (see below), whose sum is σ = 1374516000. Its totient is φ = 228962048.

The previous prime is 687072037. The next prime is 687072083. The reversal of 687072066 is 660270786.

687072066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 12385 + ... + 39083.

It is an arithmetic number, because the mean of its divisors is an integer number (85907250).

Almost surely, 2^687072066 is an apocalyptic number.

687072066 is an abundant number, since it is smaller than the sum of its proper divisors (687443934).

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

687072066 is a wasteful number, since it uses less digits than its factorization.

687072066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30993.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 687072066 is about 26212.0595528089. The cubic root of 687072066 is about 882.4039238740.

It can be divided in two parts, 6870720 and 66, that added together give a palindrome (6870786).

The spelling of 687072066 in words is "six hundred eighty-seven million, seventy-two thousand, sixty-six".