1665326254053 has 64 divisors (see below), whose sum is σ = 2818853904384. Its totient is φ = 856537704000.

The previous prime is 1665326254037. The next prime is 1665326254057. The reversal of 1665326254053 is 3504526235661.

It is a happy number.

It is not a de Polignac number, because 1665326254053 - 2⁴ = 1665326254037 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1665326253993 and 1665326254011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665326254057) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2528100 + ... + 3118002.

It is an arithmetic number, because the mean of its divisors is an integer number (44044592256).

Almost surely, 2^{1665326254053} is an apocalyptic number.

It is an amenable number.

1665326254053 is a deficient number, since it is larger than the sum of its proper divisors (1153527650331).

1665326254053 is a wasteful number, since it uses less digits than its factorization.

1665326254053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590047 (or 590025 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 48.

The spelling of 1665326254053 in words is "one trillion, six hundred sixty-five billion, three hundred twenty-six million, two hundred fifty-four thousand, fifty-three".