2663690 has 8 divisors (see below), whose sum is σ = 4794660. Its totient is φ = 1065472.

The previous prime is 2663677. The next prime is 2663693. The reversal of 2663690 is 963662.

It can be written as a sum of positive squares in 2 ways, for example, as 2563201 + 100489 = 1601^2 + 317^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2663690² = 14190488832200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2663693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133175 + ... + 133194.

2^2663690 is an apocalyptic number.

2663690 is a deficient number, since it is larger than the sum of its proper divisors (2130970).

2663690 is a wasteful number, since it uses less digits than its factorization.

2663690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266376.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 2663690 is about 1632.0814930634. The cubic root of 2663690 is about 138.6206380248.

The spelling of 2663690 in words is "two million, six hundred sixty-three thousand, six hundred ninety".