1661057837470 has 16 divisors (see below), whose sum is σ = 3007186793280. Its totient is φ = 660582538144.

The previous prime is 1661057837447. The next prime is 1661057837489. The reversal of 1661057837470 is 747387501661.

It is a super-2 number, since 2×1661057837470² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480072790 + ... + 480076249.

It is an arithmetic number, because the mean of its divisors is an integer number (187949174580).

Almost surely, 2^{1661057837470} is an apocalyptic number.

1661057837470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1661057837470 is a deficient number, since it is larger than the sum of its proper divisors (1346128955810).

1661057837470 is a wasteful number, since it uses less digits than its factorization.

1661057837470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960149219.

The product of its (nonzero) digits is 5927040, while the sum is 55.

The spelling of 1661057837470 in words is "one trillion, six hundred sixty-one billion, fifty-seven million, eight hundred thirty-seven thousand, four hundred seventy".