1661057837468 has 12 divisors (see below), whose sum is σ = 2906861569920. Its totient is φ = 830525960352.

The previous prime is 1661057837447. The next prime is 1661057837489. The reversal of 1661057837468 is 8647387501661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1661057837447) and next prime (1661057837489).

It is a super-2 number, since 2×1661057837468² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1661057837468.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 955280 + ... + 2057832.

It is an arithmetic number, because the mean of its divisors is an integer number (242238464160).

Almost surely, 2^{1661057837468} is an apocalyptic number.

It is an amenable number.

1661057837468 is a deficient number, since it is larger than the sum of its proper divisors (1245803732452).

1661057837468 is a wasteful number, since it uses less digits than its factorization.

1661057837468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479196 (or 1479194 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 62.

The spelling of 1661057837468 in words is "one trillion, six hundred sixty-one billion, fifty-seven million, eight hundred thirty-seven thousand, four hundred sixty-eight".