687666430 has 32 divisors (see below), whose sum is σ = 1421400960. Its totient is φ = 236898720.

The previous prime is 687666407. The next prime is 687666433. The reversal of 687666430 is 34666786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687666433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162424 + ... + 166603.

It is an arithmetic number, because the mean of its divisors is an integer number (44418780).

Almost surely, 2^687666430 is an apocalyptic number.

687666430 is an abundant number, since it is smaller than the sum of its proper divisors (733734530).

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

687666430 is a wasteful number, since it uses less digits than its factorization.

687666430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329064.

The product of its (nonzero) digits is 870912, while the sum is 46.

The square root of 687666430 is about 26223.3947077795. The cubic root of 687666430 is about 882.6582969791.

The spelling of 687666430 in words is "six hundred eighty-seven million, six hundred sixty-six thousand, four hundred thirty".