7862661 has 12 divisors (see below), whose sum is σ = 11401260. Its totient is φ = 5221440.

The previous prime is 7862641. The next prime is 7862669. The reversal of 7862661 is 1662687.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3261636 + 4601025 = 1806^2 + 2145^2 .

It is not a de Polignac number, because 7862661 - 2⁶ = 7862597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7862669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 975 + ... + 4083.

It is an arithmetic number, because the mean of its divisors is an integer number (950105).

Almost surely, 2^7862661 is an apocalyptic number.

It is an amenable number.

7862661 is a deficient number, since it is larger than the sum of its proper divisors (3538599).

7862661 is a wasteful number, since it uses less digits than its factorization.

7862661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3396 (or 3393 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 7862661 is about 2804.0436872488. The cubic root of 7862661 is about 198.8488958399.

It can be divided in two parts, 78626 and 61, that added together give a palindrome (78687).

The spelling of 7862661 in words is "seven million, eight hundred sixty-two thousand, six hundred sixty-one".