2664509825 has 12 divisors (see below), whose sum is σ = 3304899708. Its totient is φ = 2131022400.

The previous prime is 2664509791. The next prime is 2664509831. The reversal of 2664509825 is 5289054662.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 628605184 + 2035904641 = 25072^2 + 45121^2 .

It is not a de Polignac number, because 2664509825 - 2⁶ = 2664509761 is a prime.

It is a super-2 number, since 2×2664509825² = 14199225215043061250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2664509825.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94019 + ... + 119031.

It is an arithmetic number, because the mean of its divisors is an integer number (275408309).

Almost surely, 2^2664509825 is an apocalyptic number.

2664509825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2664509825 is a deficient number, since it is larger than the sum of its proper divisors (640389883).

2664509825 is a wasteful number, since it uses less digits than its factorization.

2664509825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29284 (or 29279 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 47.

The square root of 2664509825 is about 51618.8901953539. The cubic root of 2664509825 is about 1386.3485802377.

The spelling of 2664509825 in words is "two billion, six hundred sixty-four million, five hundred nine thousand, eight hundred twenty-five".