1662798105949 has 8 divisors (see below), whose sum is σ = 1717259263488. Its totient is φ = 1608388355280.

The previous prime is 1662798105937. The next prime is 1662798105961. The reversal of 1662798105949 is 9495018972661.

It is an interprime number because it is at equal distance from previous prime (1662798105937) and next prime (1662798105961).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1662798105949 is a prime.

It is a super-2 number, since 2×1662798105949² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662798105919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12785962 + ... + 12915355.

It is an arithmetic number, because the mean of its divisors is an integer number (214657407936).

Almost surely, 2^{1662798105949} is an apocalyptic number.

It is an amenable number.

1662798105949 is a deficient number, since it is larger than the sum of its proper divisors (54461157539).

1662798105949 is a wasteful number, since it uses less digits than its factorization.

1662798105949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25703435.

The product of its (nonzero) digits is 58786560, while the sum is 67.

The spelling of 1662798105949 in words is "one trillion, six hundred sixty-two billion, seven hundred ninety-eight million, one hundred five thousand, nine hundred forty-nine".