601666151556 has 12 divisors (see below), whose sum is σ = 1403887686992. Its totient is φ = 200555383848.

The previous prime is 601666151531. The next prime is 601666151573. The reversal of 601666151556 is 655151666106.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×601666151556³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 25069422970 + ... + 25069422993.

Almost surely, 2^601666151556 is an apocalyptic number.

It is an amenable number.

601666151556 is an abundant number, since it is smaller than the sum of its proper divisors (802221535436).

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

601666151556 is a wasteful number, since it uses less digits than its factorization.

601666151556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50138845970 (or 50138845968 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 601666151556 in words is "six hundred one billion, six hundred sixty-six million, one hundred fifty-one thousand, five hundred fifty-six".