1166204761 has 4 divisors (see below), whose sum is σ = 1168254900. Its totient is φ = 1164154624.

The previous prime is 1166204731. The next prime is 1166204783. The reversal of 1166204761 is 1674026611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1674026611 = 373 ⋅4488007.

It can be written as a sum of positive squares in 2 ways, for example, as 310993225 + 855211536 = 17635^2 + 29244^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166204761 - 2¹⁹ = 1165680473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166204701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1024216 + ... + 1025353.

It is an arithmetic number, because the mean of its divisors is an integer number (292063725).

Almost surely, 2^1166204761 is an apocalyptic number.

It is an amenable number.

1166204761 is a deficient number, since it is larger than the sum of its proper divisors (2050139).

1166204761 is an equidigital number, since it uses as much as digits as its factorization.

1166204761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050138.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1166204761 is about 34149.7402771968. The cubic root of 1166204761 is about 1052.5876497325.

The spelling of 1166204761 in words is "one billion, one hundred sixty-six million, two hundred four thousand, seven hundred sixty-one".