690647426704 has 15 divisors (see below), whose sum is σ = 1338135829923. Its totient is φ = 345322051248.

The previous prime is 690647426663. The next prime is 690647426717. The reversal of 690647426704 is 407624746096.

The square root of 690647426704 is 831052.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3220327 + ... + 3428089.

Almost surely, 2^690647426704 is an apocalyptic number.

690647426704 is the 831052-nd square number.

It is an amenable number.

690647426704 is a deficient number, since it is larger than the sum of its proper divisors (647488403219).

690647426704 is an frugal number, since it uses more digits than its factorization.

690647426704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415534 (or 207765 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 55.

The spelling of 690647426704 in words is "six hundred ninety billion, six hundred forty-seven million, four hundred twenty-six thousand, seven hundred four".