706621551 has 4 divisors (see below), whose sum is σ = 942162072. Its totient is φ = 471081032.

The previous prime is 706621549. The next prime is 706621631. The reversal of 706621551 is 155126607.

706621551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 706621551 - 2¹ = 706621549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (706621501) 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, 117770256 + ... + 117770261.

It is an arithmetic number, because the mean of its divisors is an integer number (235540518).

Almost surely, 2^706621551 is an apocalyptic number.

706621551 is a deficient number, since it is larger than the sum of its proper divisors (235540521).

706621551 is a wasteful number, since it uses less digits than its factorization.

706621551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235540520.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 706621551 is about 26582.3541282558. The cubic root of 706621551 is about 890.6948876004.

The spelling of 706621551 in words is "seven hundred six million, six hundred twenty-one thousand, five hundred fifty-one".