7866465 has 16 divisors (see below), whose sum is σ = 12894336. Its totient is φ = 4092800.

The previous prime is 7866431. The next prime is 7866473. The reversal of 7866465 is 5646687.

7866465 = 250² + 251² + ... + 339².

It is a happy number.

It is not a de Polignac number, because 7866465 - 2¹⁷ = 7735393 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5781 + ... + 7010.

It is an arithmetic number, because the mean of its divisors is an integer number (805896).

Almost surely, 2^7866465 is an apocalyptic number.

It is an amenable number.

7866465 is a deficient number, since it is larger than the sum of its proper divisors (5027871).

7866465 is a wasteful number, since it uses less digits than its factorization.

7866465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12840.

The product of its digits is 241920, while the sum is 42.

The square root of 7866465 is about 2804.7219113488. The cubic root of 7866465 is about 198.8809587444.

The spelling of 7866465 in words is "seven million, eight hundred sixty-six thousand, four hundred sixty-five".