1642766670 has 40 divisors (see below), whose sum is σ = 4417219224. Its totient is φ = 438070896.

The previous prime is 1642766659. The next prime is 1642766707. The reversal of 1642766670 is 766672461.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1013244 + ... + 1014863.

Almost surely, 2^1642766670 is an apocalyptic number.

1642766670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1642766670 is an abundant number, since it is smaller than the sum of its proper divisors (2774452554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642766670 is a wasteful number, since it uses less digits than its factorization.

1642766670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028126 (or 2028117 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 1642766670 is about 40531.0580912959. The cubic root of 1642766670 is about 1179.9364779556.

The spelling of 1642766670 in words is "one billion, six hundred forty-two million, seven hundred sixty-six thousand, six hundred seventy".