666253622 has 4 divisors (see below), whose sum is σ = 999380436. Its totient is φ = 333126810.

The previous prime is 666253603. The next prime is 666253631. The reversal of 666253622 is 226352666.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 166563404 + ... + 166563407.

It is an arithmetic number, because the mean of its divisors is an integer number (249845109).

Almost surely, 2^666253622 is an apocalyptic number.

666253622 is a deficient number, since it is larger than the sum of its proper divisors (333126814).

666253622 is a wasteful number, since it uses less digits than its factorization.

666253622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333126813.

The product of its digits is 155520, while the sum is 38.

The square root of 666253622 is about 25811.8891598426. The cubic root of 666253622 is about 873.4000135880.

The spelling of 666253622 in words is "six hundred sixty-six million, two hundred fifty-three thousand, six hundred twenty-two".