66770814071378 has 16 divisors (see below), whose sum is σ = 100197843755616. Its totient is φ = 33371535664320.

The previous prime is 66770814071329. The next prime is 66770814071393. The reversal of 66770814071378 is 87317041807766.

It is a super-2 number, since 2×66770814071378² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46561625 + ... + 47974227.

It is an arithmetic number, because the mean of its divisors is an integer number (6262365234726).

Almost surely, 2^{66770814071378} is an apocalyptic number.

66770814071378 is a deficient number, since it is larger than the sum of its proper divisors (33427029684238).

66770814071378 is a wasteful number, since it uses less digits than its factorization.

66770814071378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422409.

The product of its (nonzero) digits is 66382848, while the sum is 65.

The spelling of 66770814071378 in words is "sixty-six trillion, seven hundred seventy billion, eight hundred fourteen million, seventy-one thousand, three hundred seventy-eight".