1665610101051 has 32 divisors (see below), whose sum is σ = 2578924346880. Its totient is φ = 947359929600.

The previous prime is 1665610101049. The next prime is 1665610101097. The reversal of 1665610101051 is 1501010165661.

It is not a de Polignac number, because 1665610101051 - 2¹ = 1665610101049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1665610101011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27381655 + ... + 27442416.

It is an arithmetic number, because the mean of its divisors is an integer number (80591385840).

Almost surely, 2^{1665610101051} is an apocalyptic number.

1665610101051 is a deficient number, since it is larger than the sum of its proper divisors (913314245829).

1665610101051 is a wasteful number, since it uses less digits than its factorization.

1665610101051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54824147.

The product of its (nonzero) digits is 5400, while the sum is 33.

The spelling of 1665610101051 in words is "one trillion, six hundred sixty-five billion, six hundred ten million, one hundred one thousand, fifty-one".