66990373370 has 8 divisors (see below), whose sum is σ = 120582672084. Its totient is φ = 26796149344.

The previous prime is 66990373369. The next prime is 66990373381. The reversal of 66990373370 is 7337309966.

It can be written as a sum of positive squares in 2 ways, for example, as 57465198961 + 9525174409 = 239719^2 + 97597^2 .

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

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, 3349518659 + ... + 3349518678.

Almost surely, 2^66990373370 is an apocalyptic number.

66990373370 is a deficient number, since it is larger than the sum of its proper divisors (53592298714).

66990373370 is a wasteful number, since it uses less digits than its factorization.

66990373370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6699037344.

The product of its (nonzero) digits is 3857868, while the sum is 53.

The spelling of 66990373370 in words is "sixty-six billion, nine hundred ninety million, three hundred seventy-three thousand, three hundred seventy".