1166015947 has 2 divisors, whose sum is σ = 1166015948. Its totient is φ = 1166015946.

The previous prime is 1166015911. The next prime is 1166015969. The reversal of 1166015947 is 7495106611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1166015947 - 2²⁷ = 1031798219 is a prime.

It is not a weakly prime, because it can be changed into another prime (1166010947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583007973 + 583007974.

It is an arithmetic number, because the mean of its divisors is an integer number (583007974).

Almost surely, 2^1166015947 is an apocalyptic number.

1166015947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166015947 is an equidigital number, since it uses as much as digits as its factorization.

1166015947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 1166015947 is about 34146.9756640321. The cubic root of 1166015947 is about 1052.5308403802.

The spelling of 1166015947 in words is "one billion, one hundred sixty-six million, fifteen thousand, nine hundred forty-seven".