687760330 has 32 divisors (see below), whose sum is σ = 1335539664. Its totient is φ = 254032896.

The previous prime is 687760319. The next prime is 687760351. The reversal of 687760330 is 33067786.

It can be written as a sum of positive squares in 8 ways, for example, as 374151649 + 313608681 = 19343^2 + 17709^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29157 + ... + 47176.

Almost surely, 2^687760330 is an apocalyptic number.

687760330 is a deficient number, since it is larger than the sum of its proper divisors (647779334).

687760330 is a wasteful number, since it uses less digits than its factorization.

687760330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76410.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 687760330 is about 26225.1850327124. The cubic root of 687760330 is about 882.6984704500.

The spelling of 687760330 in words is "six hundred eighty-seven million, seven hundred sixty thousand, three hundred thirty".