306420532250666 has 8 divisors (see below), whose sum is σ = 460636555047780. Its totient is φ = 152875013901408.

The previous prime is 306420532250659. The next prime is 306420532250683. The reversal of 306420532250666 is 666052235024603.

It can be written as a sum of positive squares in 2 ways, for example, as 295797723910441 + 10622808340225 = 17198771^2 + 3259265^2 .

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

It is a super-2 number, since 2×306420532250666² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167626110821 + ... + 167626112648.

Almost surely, 2^{306420532250666} is an apocalyptic number.

306420532250666 is a deficient number, since it is larger than the sum of its proper divisors (154216022797114).

306420532250666 is a wasteful number, since it uses less digits than its factorization.

306420532250666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335252223928.

The product of its (nonzero) digits is 9331200, while the sum is 50.

The spelling of 306420532250666 in words is "three hundred six trillion, four hundred twenty billion, five hundred thirty-two million, two hundred fifty thousand, six hundred sixty-six".