670535691 has 8 divisors (see below), whose sum is σ = 1021768704. Its totient is φ = 383163240.

The previous prime is 670535687. The next prime is 670535693. The reversal of 670535691 is 196535076.

It is a happy number.

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

It is not a de Polignac number, because 670535691 - 2² = 670535687 is a prime.

It is a super-2 number, since 2×670535691² = 899236225809694962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (670535693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15965115 + ... + 15965156.

It is an arithmetic number, because the mean of its divisors is an integer number (127721088).

Almost surely, 2^670535691 is an apocalyptic number.

670535691 is a deficient number, since it is larger than the sum of its proper divisors (351233013).

670535691 is a wasteful number, since it uses less digits than its factorization.

670535691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31930281.

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 670535691 is about 25894.7039179829. The cubic root of 670535691 is about 875.2671580411.

The spelling of 670535691 in words is "six hundred seventy million, five hundred thirty-five thousand, six hundred ninety-one".