1406757666 has 16 divisors (see below), whose sum is σ = 2827656000. Its totient is φ = 466562448.

The previous prime is 1406757629. The next prime is 1406757697. The reversal of 1406757666 is 6667576041.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587901 + ... + 590288.

It is an arithmetic number, because the mean of its divisors is an integer number (176728500).

Almost surely, 2^1406757666 is an apocalyptic number.

1406757666 is an abundant number, since it is smaller than the sum of its proper divisors (1420898334).

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

1406757666 is a wasteful number, since it uses less digits than its factorization.

1406757666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178393.

The product of its (nonzero) digits is 1270080, while the sum is 48.

The square root of 1406757666 is about 37506.7682692071. The cubic root of 1406757666 is about 1120.4859886012.

The spelling of 1406757666 in words is "one billion, four hundred six million, seven hundred fifty-seven thousand, six hundred sixty-six".