66671154974 has 4 divisors (see below), whose sum is σ = 100006732464. Its totient is φ = 33335577486.

The previous prime is 66671154937. The next prime is 66671155037. The reversal of 66671154974 is 47945117666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47945117666 = 2 ⋅23972558833.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16667788742 + ... + 16667788745.

It is an arithmetic number, because the mean of its divisors is an integer number (25001683116).

Almost surely, 2^66671154974 is an apocalyptic number.

66671154974 is a deficient number, since it is larger than the sum of its proper divisors (33335577490).

66671154974 is a wasteful number, since it uses less digits than its factorization.

66671154974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33335577489.

The product of its digits is 7620480, while the sum is 56.

The spelling of 66671154974 in words is "sixty-six billion, six hundred seventy-one million, one hundred fifty-four thousand, nine hundred seventy-four".