66977570834 has 8 divisors (see below), whose sum is σ = 101441758080. Its totient is φ = 33163651476.

The previous prime is 66977570827. The next prime is 66977570839. The reversal of 66977570834 is 43807577966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66977570839) 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, 162566714 + ... + 162567125.

It is an arithmetic number, because the mean of its divisors is an integer number (12680219760).

Almost surely, 2^66977570834 is an apocalyptic number.

66977570834 is a deficient number, since it is larger than the sum of its proper divisors (34464187246).

66977570834 is a wasteful number, since it uses less digits than its factorization.

66977570834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325133944.

The product of its (nonzero) digits is 53343360, while the sum is 62.

The spelling of 66977570834 in words is "sixty-six billion, nine hundred seventy-seven million, five hundred seventy thousand, eight hundred thirty-four".