66949877894966 has 8 divisors (see below), whose sum is σ = 109554345646344. Its totient is φ = 30431762679520.

The previous prime is 66949877894959. The next prime is 66949877894983.

66949877894966 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1521588133955 + ... + 1521588133998.

It is an arithmetic number, because the mean of its divisors is an integer number (13694293205793).

Almost surely, 2^{66949877894966} is an apocalyptic number.

66949877894966 is a deficient number, since it is larger than the sum of its proper divisors (42604467751378).

66949877894966 is a wasteful number, since it uses less digits than its factorization.

66949877894966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043176267966.

The product of its digits is 426649337856, while the sum is 98.

The spelling of 66949877894966 in words is "sixty-six trillion, nine hundred forty-nine billion, eight hundred seventy-seven million, eight hundred ninety-four thousand, nine hundred sixty-six".