601856350666 has 4 divisors (see below), whose sum is σ = 902784526002. Its totient is φ = 300928175332.

The previous prime is 601856350661. The next prime is 601856350727. The reversal of 601856350666 is 666053658106.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666053658106 = 2 ⋅333026829053.

It can be written as a sum of positive squares in only one way, i.e., 454646775625 + 147209575041 = 674275^2 + 383679^2 .

It is not an unprimeable number, because it can be changed into a prime (601856350661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150464087665 + ... + 150464087668.

Almost surely, 2^601856350666 is an apocalyptic number.

601856350666 is a deficient number, since it is larger than the sum of its proper divisors (300928175336).

601856350666 is a wasteful number, since it uses less digits than its factorization.

601856350666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300928175335.

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 601856350666 in words is "six hundred one billion, eight hundred fifty-six million, three hundred fifty thousand, six hundred sixty-six".