7665426 has 12 divisors (see below), whose sum is σ = 16608462. Its totient is φ = 2555136.

The previous prime is 7665407. The next prime is 7665431. The reversal of 7665426 is 6245667.

It can be written as a sum of positive squares in only one way, i.e., 5978025 + 1687401 = 2445^2 + 1299^2 .

It is a super-2 number, since 2×7665426² = 117517511522952, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212911 + ... + 212946.

Almost surely, 2^7665426 is an apocalyptic number.

7665426 is an abundant number, since it is smaller than the sum of its proper divisors (8943036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7665426 is a wasteful number, since it uses less digits than its factorization.

7665426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425865 (or 425862 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 7665426 is about 2768.6505738356. The cubic root of 7665426 is about 197.1720863134.

It can be divided in two parts, 7665 and 426, that multiplied together give a triangular number (3265290 = T₂₅₅₅).

The spelling of 7665426 in words is "seven million, six hundred sixty-five thousand, four hundred twenty-six".