1071763661 has 4 divisors (see below), whose sum is σ = 1075839072. Its totient is φ = 1067688252.

The previous prime is 1071763613. The next prime is 1071763699. The reversal of 1071763661 is 1663671701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1071763661 - 2⁶ = 1071763597 is a prime.

It is a super-3 number, since 3×1071763661³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071763601) 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, 2037311 + ... + 2037836.

It is an arithmetic number, because the mean of its divisors is an integer number (268959768).

Almost surely, 2^1071763661 is an apocalyptic number.

It is an amenable number.

1071763661 is a deficient number, since it is larger than the sum of its proper divisors (4075411).

1071763661 is an equidigital number, since it uses as much as digits as its factorization.

1071763661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075410.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 1071763661 is about 32737.8017130045. The cubic root of 1071763661 is about 1023.3707723491.

The spelling of 1071763661 in words is "one billion, seventy-one million, seven hundred sixty-three thousand, six hundred sixty-one".