670437657 has 12 divisors (see below), whose sum is σ = 989015040. Its totient is φ = 437448408.

The previous prime is 670437643. The next prime is 670437671. The reversal of 670437657 is 756734076.

670437657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (670437643) and next prime (670437671).

It is not a de Polignac number, because 670437657 - 2¹⁶ = 670372121 is a prime.

It is a super-3 number, since 3×670437657³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (670457657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 792057 + ... + 792902.

It is an arithmetic number, because the mean of its divisors is an integer number (82417920).

Almost surely, 2^670437657 is an apocalyptic number.

It is an amenable number.

670437657 is a deficient number, since it is larger than the sum of its proper divisors (318577383).

670437657 is a wasteful number, since it uses less digits than its factorization.

670437657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585012 (or 1585009 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 45.

The square root of 670437657 is about 25892.8109134563. The cubic root of 670437657 is about 875.2245005442.

The spelling of 670437657 in words is "six hundred seventy million, four hundred thirty-seven thousand, six hundred fifty-seven".