1665227404290 has 16 divisors (see below), whose sum is σ = 3996545770368. Its totient is φ = 444060641136.

The previous prime is 1665227404289. The next prime is 1665227404303. The reversal of 1665227404290 is 924047225661.

It is a super-2 number, since 2×1665227404290² (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, 27753790042 + ... + 27753790101.

It is an arithmetic number, because the mean of its divisors is an integer number (249784110648).

Almost surely, 2^{1665227404290} is an apocalyptic number.

1665227404290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1665227404290 is an abundant number, since it is smaller than the sum of its proper divisors (2331318366078).

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

1665227404290 is a wasteful number, since it uses less digits than its factorization.

1665227404290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55507580153.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 1665227404290 in words is "one trillion, six hundred sixty-five billion, two hundred twenty-seven million, four hundred four thousand, two hundred ninety".