2664521161266 has 64 divisors (see below), whose sum is σ = 5888193792768. Its totient is φ = 799535751168.

The previous prime is 2664521161259. The next prime is 2664521161273. The reversal of 2664521161266 is 6621611254662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2664521161259) and next prime (2664521161273).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70626240 + ... + 70663956.

It is an arithmetic number, because the mean of its divisors is an integer number (92003028012).

Almost surely, 2^{2664521161266} is an apocalyptic number.

2664521161266 is an abundant number, since it is smaller than the sum of its proper divisors (3223672631502).

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

2664521161266 is a wasteful number, since it uses less digits than its factorization.

2664521161266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67875.

The product of its digits is 1244160, while the sum is 48.

The spelling of 2664521161266 in words is "two trillion, six hundred sixty-four billion, five hundred twenty-one million, one hundred sixty-one thousand, two hundred sixty-six".