628664701 has 4 divisors (see below), whose sum is σ = 718473952. Its totient is φ = 538855452.

The previous prime is 628664683. The next prime is 628664713. The reversal of 628664701 is 107466826.

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 628664701 - 2¹⁹ = 628140413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628664731) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 44904615 + ... + 44904628.

It is an arithmetic number, because the mean of its divisors is an integer number (179618488).

Almost surely, 2^628664701 is an apocalyptic number.

It is an amenable number.

628664701 is a deficient number, since it is larger than the sum of its proper divisors (89809251).

628664701 is an equidigital number, since it uses as much as digits as its factorization.

628664701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89809250.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 628664701 is about 25073.1868935722. The cubic root of 628664701 is about 856.6557979480.

The spelling of 628664701 in words is "six hundred twenty-eight million, six hundred sixty-four thousand, seven hundred one".