1661057837466 has 16 divisors (see below), whose sum is σ = 3429280697088. Its totient is φ = 535825108800.

The previous prime is 1661057837447. The next prime is 1661057837489. The reversal of 1661057837466 is 6647387501661.

It is a super-2 number, since 2×1661057837466² (a number of 25 digits) contains 22 as substring.

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, 4465209055 + ... + 4465209426.

It is an arithmetic number, because the mean of its divisors is an integer number (214330043568).

Almost surely, 2^{1661057837466} is an apocalyptic number.

1661057837466 is an abundant number, since it is smaller than the sum of its proper divisors (1768222859622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661057837466 is a wasteful number, since it uses less digits than its factorization.

1661057837466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8930418517.

The product of its (nonzero) digits is 30481920, while the sum is 60.

The spelling of 1661057837466 in words is "one trillion, six hundred sixty-one billion, fifty-seven million, eight hundred thirty-seven thousand, four hundred sixty-six".