306620221452666 has 64 divisors (see below), whose sum is σ = 669397254451200. Its totient is φ = 92858600736000.

The previous prime is 306620221452653. The next prime is 306620221452689. The reversal of 306620221452666 is 666254122026603.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4352212741 + ... + 4352283191.

It is an arithmetic number, because the mean of its divisors is an integer number (10459332100800).

Almost surely, 2^{306620221452666} is an apocalyptic number.

306620221452666 is an abundant number, since it is smaller than the sum of its proper divisors (362777032998534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

306620221452666 is a wasteful number, since it uses less digits than its factorization.

306620221452666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109715.

The product of its (nonzero) digits is 7464960, while the sum is 51.

The spelling of 306620221452666 in words is "three hundred six trillion, six hundred twenty billion, two hundred twenty-one million, four hundred fifty-two thousand, six hundred sixty-six".