66674076740 has 12 divisors (see below), whose sum is σ = 140015561196. Its totient is φ = 26669630688.

The previous prime is 66674076737. The next prime is 66674076743. The reversal of 66674076740 is 4767047666.

It is an interprime number because it is at equal distance from previous prime (66674076737) and next prime (66674076743).

It can be written as a sum of positive squares in 2 ways, for example, as 24786723844 + 41887352896 = 157438^2 + 204664^2 .

It is not an unprimeable number, because it can be changed into a prime (66674076743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1666851899 + ... + 1666851938.

It is an arithmetic number, because the mean of its divisors is an integer number (11667963433).

Almost surely, 2^66674076740 is an apocalyptic number.

It is an amenable number.

66674076740 is an abundant number, since it is smaller than the sum of its proper divisors (73341484456).

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

66674076740 is a wasteful number, since it uses less digits than its factorization.

66674076740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333703846 (or 3333703844 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 53.

The spelling of 66674076740 in words is "sixty-six billion, six hundred seventy-four million, seventy-six thousand, seven hundred forty".