2664405 has 12 divisors (see below), whose sum is σ = 4618380. Its totient is φ = 1420992.

The previous prime is 2664401. The next prime is 2664439. The reversal of 2664405 is 5044662.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1238769 + 1425636 = 1113^2 + 1194^2 .

It is not a de Polignac number, because 2664405 - 2² = 2664401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2664401) 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, 29560 + ... + 29649.

It is an arithmetic number, because the mean of its divisors is an integer number (384865).

2^2664405 is an apocalyptic number.

It is an amenable number.

2664405 is a deficient number, since it is larger than the sum of its proper divisors (1953975).

2664405 is a wasteful number, since it uses less digits than its factorization.

2664405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59220 (or 59217 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 2664405 is about 1632.3005238007. The cubic root of 2664405 is about 138.6330399796.

The spelling of 2664405 in words is "two million, six hundred sixty-four thousand, four hundred five".