66742400424766 has 32 divisors (see below), whose sum is σ = 115639808578560. Its totient is φ = 28552758000000.

The previous prime is 66742400424751. The next prime is 66742400424781.

66742400424766 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (66742400424751) and next prime (66742400424781).

It is a self number, because there is not a number n which added to its sum of digits gives 66742400424766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118932945 + ... + 119492803.

It is an arithmetic number, because the mean of its divisors is an integer number (3613744018080).

Almost surely, 2^{66742400424766} is an apocalyptic number.

66742400424766 is a deficient number, since it is larger than the sum of its proper divisors (48897408153794).

66742400424766 is a wasteful number, since it uses less digits than its factorization.

66742400424766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878640.

The product of its (nonzero) digits is 65028096, while the sum is 58.

The spelling of 66742400424766 in words is "sixty-six trillion, seven hundred forty-two billion, four hundred million, four hundred twenty-four thousand, seven hundred sixty-six".