1664693097350 has 24 divisors (see below), whose sum is σ = 3097121222448. Its totient is φ = 665706903200.

The previous prime is 1664693097313. The next prime is 1664693097371. The reversal of 1664693097350 is 537903964661.

It is a happy number.

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1664693097350.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4060889 + ... + 4451988.

It is an arithmetic number, because the mean of its divisors is an integer number (129046717602).

Almost surely, 2^{1664693097350} is an apocalyptic number.

1664693097350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1664693097350 is a deficient number, since it is larger than the sum of its proper divisors (1432428125098).

1664693097350 is a wasteful number, since it uses less digits than its factorization.

1664693097350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8516800 (or 8516795 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 59.

The spelling of 1664693097350 in words is "one trillion, six hundred sixty-four billion, six hundred ninety-three million, ninety-seven thousand, three hundred fifty".