66619071317630 has 48 divisors (see below), whose sum is σ = 129911314440960. Its totient is φ = 24585828269184.

The previous prime is 66619071317627. The next prime is 66619071317719. The reversal of 66619071317630 is 3671317091666.

It is a super-4 number, since 4×66619071317630⁴ (a number of 56 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6130910 + ... + 13070049.

It is an arithmetic number, because the mean of its divisors is an integer number (2706485717520).

Almost surely, 2^{66619071317630} is an apocalyptic number.

66619071317630 is a deficient number, since it is larger than the sum of its proper divisors (63292243123330).

66619071317630 is a wasteful number, since it uses less digits than its factorization.

66619071317630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19203045 (or 19203032 counting only the distinct ones).

The product of its (nonzero) digits is 5143824, while the sum is 56.

The spelling of 66619071317630 in words is "sixty-six trillion, six hundred nineteen billion, seventy-one million, three hundred seventeen thousand, six hundred thirty".