601661021615061 has 16 divisors (see below), whose sum is σ = 802434418777728. Its totient is φ = 400997489921600.

The previous prime is 601661021615047. The next prime is 601661021615117. The reversal of 601661021615061 is 160516120166106.

It is a cyclic number.

It is not a de Polignac number, because 601661021615061 - 2³⁸ = 601386143708117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601661021615461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 671956576 + ... + 672851366.

It is an arithmetic number, because the mean of its divisors is an integer number (50152151173608).

Almost surely, 2^{601661021615061} is an apocalyptic number.

It is an amenable number.

601661021615061 is a deficient number, since it is larger than the sum of its proper divisors (200773397162667).

601661021615061 is a wasteful number, since it uses less digits than its factorization.

601661021615061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955932.

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 601661021615061 in words is "six hundred one trillion, six hundred sixty-one billion, twenty-one million, six hundred fifteen thousand, sixty-one".