2665766151650 has 72 divisors (see below), whose sum is σ = 5771147068260. Its totient is φ = 913454115840.

The previous prime is 2665766151649. The next prime is 2665766151661. The reversal of 2665766151650 is 561516675662.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 607204068289 + 2058562083361 = 779233^2 + 1434769^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3984506 + ... + 4605194.

Almost surely, 2^{2665766151650} is an apocalyptic number.

2665766151650 is an abundant number, since it is smaller than the sum of its proper divisors (3105380916610).

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

2665766151650 is a wasteful number, since it uses less digits than its factorization.

2665766151650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622468 (or 622456 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 56.

The spelling of 2665766151650 in words is "two trillion, six hundred sixty-five billion, seven hundred sixty-six million, one hundred fifty-one thousand, six hundred fifty".