664010551 has 4 divisors (see below), whose sum is σ = 664983432. Its totient is φ = 663037672.

The previous prime is 664010527. The next prime is 664010561. The reversal of 664010551 is 155010466.

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 664010551 - 2¹³ = 664002359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664010521) 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, 485416 + ... + 486781.

It is an arithmetic number, because the mean of its divisors is an integer number (166245858).

Almost surely, 2^664010551 is an apocalyptic number.

664010551 is a deficient number, since it is larger than the sum of its proper divisors (972881).

664010551 is an equidigital number, since it uses as much as digits as its factorization.

664010551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972880.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 664010551 is about 25768.4021817419. The cubic root of 664010551 is about 872.4187551709.

The spelling of 664010551 in words is "six hundred sixty-four million, ten thousand, five hundred fifty-one".