1662540500651 has 2 divisors, whose sum is σ = 1662540500652. Its totient is φ = 1662540500650.

The previous prime is 1662540500633. The next prime is 1662540500659. The reversal of 1662540500651 is 1560050452661.

It is a strong prime.

It is an emirp because it is prime and its reverse (1560050452661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1662540500651 - 2¹⁸ = 1662540238507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1662540500599 and 1662540500608.

It is not a weakly prime, because it can be changed into another prime (1662540500659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831270250325 + 831270250326.

It is an arithmetic number, because the mean of its divisors is an integer number (831270250326).

Almost surely, 2^{1662540500651} is an apocalyptic number.

1662540500651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662540500651 is an equidigital number, since it uses as much as digits as its factorization.

1662540500651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 1662540500651 in words is "one trillion, six hundred sixty-two billion, five hundred forty million, five hundred thousand, six hundred fifty-one".