706660649 has 4 divisors (see below), whose sum is σ = 713521536. Its totient is φ = 699799764.

The previous prime is 706660637. The next prime is 706660693. The reversal of 706660649 is 946066607.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 706660649 - 2¹² = 706656553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (706660699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3430289 + ... + 3430494.

It is an arithmetic number, because the mean of its divisors is an integer number (178380384).

Almost surely, 2^706660649 is an apocalyptic number.

It is an amenable number.

706660649 is a deficient number, since it is larger than the sum of its proper divisors (6860887).

706660649 is a wasteful number, since it uses less digits than its factorization.

706660649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6860886.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 706660649 is about 26583.0895307524. The cubic root of 706660649 is about 890.7113149447.

The spelling of 706660649 in words is "seven hundred six million, six hundred sixty thousand, six hundred forty-nine".