1669478501376 has 1320 divisors, whose sum is σ = 6243388745616. Its totient is φ = 441447874560.

The previous prime is 1669478501357. The next prime is 1669478501389. The reversal of 1669478501376 is 6731058749661.

1669478501376 is a `hidden beast` number, since 1 + 6 + 6 + 94 + 7 + 8 + 501 + 37 + 6 = 666.

It is a super-3 number, since 3×1669478501376³ (a number of 38 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 5043741531 + ... + 5043741861.

Almost surely, 2^{1669478501376} is an apocalyptic number.

1669478501376 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 1669478501376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3121694372808).

1669478501376 is an abundant number, since it is smaller than the sum of its proper divisors (4573910244240).

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

1669478501376 is a wasteful number, since it uses less digits than its factorization.

1669478501376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 63.

The spelling of 1669478501376 in words is "one trillion, six hundred sixty-nine billion, four hundred seventy-eight million, five hundred one thousand, three hundred seventy-six".