2664978 has 32 divisors (see below), whose sum is σ = 5691840. Its totient is φ = 829440.

The previous prime is 2664967. The next prime is 2664989. The reversal of 2664978 is 8794662.

It is an interprime number because it is at equal distance from previous prime (2664967) and next prime (2664989).

It is a d-powerful number, because it can be written as 2¹¹ + 6⁵ + 6⁵ + 4⁷ + 9⁶ + 7⁴ + 8⁷ .

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, 10938 + ... + 11178.

It is an arithmetic number, because the mean of its divisors is an integer number (177870).

2^2664978 is an apocalyptic number.

2664978 is an abundant number, since it is smaller than the sum of its proper divisors (3026862).

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

2664978 is a wasteful number, since it uses less digits than its factorization.

2664978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362.

The product of its digits is 145152, while the sum is 42.

The square root of 2664978 is about 1632.4760335147. The cubic root of 2664978 is about 138.6429772874.

The spelling of 2664978 in words is "two million, six hundred sixty-four thousand, nine hundred seventy-eight".