66956941416 has 64 divisors (see below), whose sum is σ = 172873451520. Its totient is φ = 21588845760.

The previous prime is 66956941411. The next prime is 66956941433. The reversal of 66956941416 is 61414965966.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66956941411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1648731 + ... + 1688853.

It is an arithmetic number, because the mean of its divisors is an integer number (2701147680).

Almost surely, 2^66956941416 is an apocalyptic number.

It is an amenable number.

66956941416 is an abundant number, since it is smaller than the sum of its proper divisors (105916510104).

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

66956941416 is a wasteful number, since it uses less digits than its factorization.

66956941416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42406 (or 42402 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 57.

The spelling of 66956941416 in words is "sixty-six billion, nine hundred fifty-six million, nine hundred forty-one thousand, four hundred sixteen".