670919530681 has 4 divisors (see below), whose sum is σ = 671120950864. Its totient is φ = 670718110500.

The previous prime is 670919530661. The next prime is 670919530727. The reversal of 670919530681 is 186035919076.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 670919530681 - 2⁵ = 670919530649 is a prime.

It is a super-2 number, since 2×670919530681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670919530601) 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, 100705095 + ... + 100711756.

It is an arithmetic number, because the mean of its divisors is an integer number (167780237716).

Almost surely, 2^670919530681 is an apocalyptic number.

It is an amenable number.

670919530681 is a deficient number, since it is larger than the sum of its proper divisors (201420183).

670919530681 is a wasteful number, since it uses less digits than its factorization.

670919530681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201420182.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 670919530681 in words is "six hundred seventy billion, nine hundred nineteen million, five hundred thirty thousand, six hundred eighty-one".