7701661 has 16 divisors (see below), whose sum is σ = 8755200. Its totient is φ = 6713280.

The previous prime is 7701649. The next prime is 7701689. The reversal of 7701661 is 1661077.

It is not a de Polignac number, because 7701661 - 2¹⁵ = 7668893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7701611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51615 + ... + 51763.

It is an arithmetic number, because the mean of its divisors is an integer number (547200).

Almost surely, 2^7701661 is an apocalyptic number.

It is an amenable number.

7701661 is a deficient number, since it is larger than the sum of its proper divisors (1053539).

7701661 is a wasteful number, since it uses less digits than its factorization.

7701661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324.

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

The square root of 7701661 is about 2775.1866603888. The cubic root of 7701661 is about 197.4822800958.

It can be divided in two parts, 77016 and 61, that added together give a palindrome (77077).

The spelling of 7701661 in words is "seven million, seven hundred one thousand, six hundred sixty-one".