621072666506 has 16 divisors (see below), whose sum is σ = 939873177600. Its totient is φ = 307793770128.

The previous prime is 621072666373. The next prime is 621072666523. The reversal of 621072666506 is 605666270126.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2938346 + ... + 3142613.

It is an arithmetic number, because the mean of its divisors is an integer number (58742073600).

Almost surely, 2^621072666506 is an apocalyptic number.

621072666506 is a deficient number, since it is larger than the sum of its proper divisors (318800511094).

621072666506 is a wasteful number, since it uses less digits than its factorization.

621072666506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6081413.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 621072666506 in words is "six hundred twenty-one billion, seventy-two million, six hundred sixty-six thousand, five hundred six".