2661666653301 has 16 divisors (see below), whose sum is σ = 3661601455680. Its totient is φ = 1718710865280.

The previous prime is 2661666653291. The next prime is 2661666653309. The reversal of 2661666653301 is 1033566661662.

It is not a de Polignac number, because 2661666653301 - 2¹³ = 2661666645109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661666653309) 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, 77823070 + ... + 77857263.

It is an arithmetic number, because the mean of its divisors is an integer number (228850090980).

Almost surely, 2^{2661666653301} is an apocalyptic number.

It is an amenable number.

2661666653301 is a deficient number, since it is larger than the sum of its proper divisors (999934802379).

2661666653301 is a wasteful number, since it uses less digits than its factorization.

2661666653301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155680516.

The product of its (nonzero) digits is 4199040, while the sum is 51.

The spelling of 2661666653301 in words is "two trillion, six hundred sixty-one billion, six hundred sixty-six million, six hundred fifty-three thousand, three hundred one".