1051666406 has 32 divisors (see below), whose sum is σ = 1827608832. Its totient is φ = 444564000.

The previous prime is 1051666403. The next prime is 1051666409. The reversal of 1051666406 is 6046661501.

It is an interprime number because it is at equal distance from previous prime (1051666403) and next prime (1051666409).

It is a super-2 number, since 2×1051666406² = 2212004459017913672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051666403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374600 + ... + 377396.

It is an arithmetic number, because the mean of its divisors is an integer number (57112776).

Almost surely, 2^1051666406 is an apocalyptic number.

1051666406 is a deficient number, since it is larger than the sum of its proper divisors (775942426).

1051666406 is a wasteful number, since it uses less digits than its factorization.

1051666406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3164.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1051666406 is about 32429.4065008905. The cubic root of 1051666406 is about 1016.9337643589.

The spelling of 1051666406 in words is "one billion, fifty-one million, six hundred sixty-six thousand, four hundred six".