66791626982 has 4 divisors (see below), whose sum is σ = 100187440476. Its totient is φ = 33395813490.

The previous prime is 66791626973. The next prime is 66791626987. The reversal of 66791626982 is 28962619766.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×66791626982² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66791626987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16697906744 + ... + 16697906747.

It is an arithmetic number, because the mean of its divisors is an integer number (25046860119).

Almost surely, 2^66791626982 is an apocalyptic number.

66791626982 is a deficient number, since it is larger than the sum of its proper divisors (33395813494).

66791626982 is a wasteful number, since it uses less digits than its factorization.

66791626982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33395813493.

The product of its digits is 23514624, while the sum is 62.

The spelling of 66791626982 in words is "sixty-six billion, seven hundred ninety-one million, six hundred twenty-six thousand, nine hundred eighty-two".