1661077 has 4 divisors (see below), whose sum is σ = 1812096. Its totient is φ = 1510060.

The previous prime is 1661069. The next prime is 1661111. The reversal of 1661077 is 7701661.

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 1661077 - 2³ = 1661069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661677) 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, 75493 + ... + 75514.

It is an arithmetic number, because the mean of its divisors is an integer number (453024).

2^1661077 is an apocalyptic number.

It is an amenable number.

1661077 is a deficient number, since it is larger than the sum of its proper divisors (151019).

1661077 is a wasteful number, since it uses less digits than its factorization.

1661077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151018.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 1661077 is about 1288.8277619605. The cubic root of 1661077 is about 118.4304160428.

The spelling of 1661077 in words is "one million, six hundred sixty-one thousand, seventy-seven".