671695501 has 4 divisors (see below), whose sum is σ = 674879104. Its totient is φ = 668511900.

The previous prime is 671695489. The next prime is 671695513. The reversal of 671695501 is 105596176.

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 an interprime number because it is at equal distance from previous prime (671695489) and next prime (671695513).

It is a cyclic number.

It is not a de Polignac number, because 671695501 - 2²³ = 663306893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671695601) 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, 1591485 + ... + 1591906.

It is an arithmetic number, because the mean of its divisors is an integer number (168719776).

Almost surely, 2^671695501 is an apocalyptic number.

It is an amenable number.

671695501 is a deficient number, since it is larger than the sum of its proper divisors (3183603).

671695501 is a wasteful number, since it uses less digits than its factorization.

671695501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183602.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 671695501 is about 25917.0889761948. The cubic root of 671695501 is about 875.7715104506.

The spelling of 671695501 in words is "six hundred seventy-one million, six hundred ninety-five thousand, five hundred one".