625978766 has 8 divisors (see below), whose sum is σ = 1073106480. Its totient is φ = 268276608.

The previous prime is 625978763. The next prime is 625978781. The reversal of 625978766 is 667879526.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625978763) 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, 22356371 + ... + 22356398.

It is an arithmetic number, because the mean of its divisors is an integer number (134138310).

Almost surely, 2^625978766 is an apocalyptic number.

625978766 is a deficient number, since it is larger than the sum of its proper divisors (447127714).

625978766 is a wasteful number, since it uses less digits than its factorization.

625978766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44712778.

The product of its digits is 7620480, while the sum is 56.

The square root of 625978766 is about 25019.5676621320. The cubic root of 625978766 is about 855.4340515807.

The spelling of 625978766 in words is "six hundred twenty-five million, nine hundred seventy-eight thousand, seven hundred sixty-six".