19970106660 has 192 divisors, whose sum is σ = 71066634240. Its totient is φ = 4560624000.

The previous prime is 19970106641. The next prime is 19970106679. The reversal of 19970106660 is 6660107991.

It is an interprime number because it is at equal distance from previous prime (19970106641) and next prime (19970106679).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 8507607 + ... + 8509953.

It is an arithmetic number, because the mean of its divisors is an integer number (370138720).

Almost surely, 2^19970106660 is an apocalyptic number.

19970106660 is a gapful number since it is divisible by the number (10) 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 19970106660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35533317120).

19970106660 is an abundant number, since it is smaller than the sum of its proper divisors (51096527580).

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

19970106660 is a wasteful number, since it uses less digits than its factorization.

19970106660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4623 (or 4615 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The spelling of 19970106660 in words is "nineteen billion, nine hundred seventy million, one hundred six thousand, six hundred sixty".