1077001661 has 4 divisors (see below), whose sum is σ = 1106109852. Its totient is φ = 1047893472.

The previous prime is 1077001633. The next prime is 1077001687. The reversal of 1077001661 is 1661007701.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 788205625 + 288796036 = 28075^2 + 16994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1077001661 - 2²² = 1072807357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1077001621) 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, 14554040 + ... + 14554113.

It is an arithmetic number, because the mean of its divisors is an integer number (276527463).

Almost surely, 2^1077001661 is an apocalyptic number.

It is an amenable number.

1077001661 is a deficient number, since it is larger than the sum of its proper divisors (29108191).

1077001661 is an equidigital number, since it uses as much as digits as its factorization.

1077001661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29108190.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 1077001661 is about 32817.7034693167. The cubic root of 1077001661 is about 1025.0352273437.

The spelling of 1077001661 in words is "one billion, seventy-seven million, one thousand, six hundred sixty-one".