1166435723420 has 48 divisors (see below), whose sum is σ = 2758398160896. Its totient is φ = 410475912000.

The previous prime is 1166435723393. The next prime is 1166435723437. The reversal of 1166435723420 is 243275346611.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85508996 + ... + 85522635.

It is an arithmetic number, because the mean of its divisors is an integer number (57466628352).

Almost surely, 2^{1166435723420} is an apocalyptic number.

1166435723420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1166435723420 is an abundant number, since it is smaller than the sum of its proper divisors (1591962437476).

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

1166435723420 is a wasteful number, since it uses less digits than its factorization.

1166435723420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171031682 (or 171031680 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 1166435723420 in words is "one trillion, one hundred sixty-six billion, four hundred thirty-five million, seven hundred twenty-three thousand, four hundred twenty".