1661962239696 has 320 divisors, whose sum is σ = 5011592380416. Its totient is φ = 469015142400.

The previous prime is 1661962239677. The next prime is 1661962239709. The reversal of 1661962239696 is 6969322691661.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 479918061 + ... + 479921523.

Almost surely, 2^{1661962239696} is an apocalyptic number.

1661962239696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1661962239696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2505796190208).

1661962239696 is an abundant number, since it is smaller than the sum of its proper divisors (3349630140720).

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

1661962239696 is a wasteful number, since it uses less digits than its factorization.

1661962239696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050 (or 4044 counting only the distinct ones).

The product of its digits is 68024448, while the sum is 66.

The spelling of 1661962239696 in words is "one trillion, six hundred sixty-one billion, nine hundred sixty-two million, two hundred thirty-nine thousand, six hundred ninety-six".