66377399849370 has 48 divisors (see below), whose sum is σ = 173024893271880. Its totient is φ = 17655137020032.

The previous prime is 66377399849309. The next prime is 66377399849393. The reversal of 66377399849370 is 7394899377366.

66377399849370 is a `hidden beast` number, since 6 + 6 + 3 + 7 + 7 + 39 + 98 + 493 + 7 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 28412812354689 + 37964587494681 = 5330367^2 + 6161541^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66377399849370.

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, 947942709 + ... + 948012728.

Almost surely, 2^{66377399849370} is an apocalyptic number.

66377399849370 is an abundant number, since it is smaller than the sum of its proper divisors (106647493422510).

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

66377399849370 is a wasteful number, since it uses less digits than its factorization.

66377399849370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895955839 (or 1895955836 counting only the distinct ones).

The product of its (nonzero) digits is 7777461888, while the sum is 81.

The spelling of 66377399849370 in words is "sixty-six trillion, three hundred seventy-seven billion, three hundred ninety-nine million, eight hundred forty-nine thousand, three hundred seventy".